| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<!-- XBRL document created with Toppan Merrill Bridge 10.1.0.3 --> |
<!-- Based on XBRL 2.1 --> |
<!-- Created on: 11/14/2022 9:48:17 PM --> |
<!-- Modified on: 11/14/2022 9:48:17 PM --> |
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance"> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#StatementCondensedConsolidatedBalanceSheets" roleURI="http://www.globalpower.com/role/StatementCondensedConsolidatedBalanceSheets" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#StatementCondensedConsolidatedStatementsOfOperations" roleURI="http://www.globalpower.com/role/StatementCondensedConsolidatedStatementsOfOperations" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#StatementCondensedConsolidatedStatementsOfComprehensiveIncomeLoss" roleURI="http://www.globalpower.com/role/StatementCondensedConsolidatedStatementsOfComprehensiveIncomeLoss" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#StatementCondensedConsolidatedStatementsOfCashFlows" roleURI="http://www.globalpower.com/role/StatementCondensedConsolidatedStatementsOfCashFlows" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureLeasesLeaseCostDetails" roleURI="http://www.globalpower.com/role/DisclosureLeasesLeaseCostDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureLeasesRightOfUseAssetsAndLeaseLiabilitiesDetails" roleURI="http://www.globalpower.com/role/DisclosureLeasesRightOfUseAssetsAndLeaseLiabilitiesDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureLeasesRemainingLeasePaymentsDetails" roleURI="http://www.globalpower.com/role/DisclosureLeasesRemainingLeasePaymentsDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureLeasesRemainingLeasePaymentsDetailsCalc2" roleURI="http://www.globalpower.com/role/DisclosureLeasesRemainingLeasePaymentsDetailsCalc2" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureChangesInBusinessDiscontinuedOperationAndDispositionDetails" roleURI="http://www.globalpower.com/role/DisclosureChangesInBusinessDiscontinuedOperationAndDispositionDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureChangesInBusinessDetailsCalc2" roleURI="http://www.globalpower.com/role/DisclosureChangesInBusinessDetailsCalc2" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureRevenueContractAssetsAndContractLiabilitiesDetails" roleURI="http://www.globalpower.com/role/DisclosureRevenueContractAssetsAndContractLiabilitiesDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureRevenueDetailsCalc3" roleURI="http://www.globalpower.com/role/DisclosureRevenueDetailsCalc3" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureEarningsLossPerShareDetails" roleURI="http://www.globalpower.com/role/DisclosureEarningsLossPerShareDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureDebtDetails" roleURI="http://www.globalpower.com/role/DisclosureDebtDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureOtherSupplementalInformationOtherCurrentAssetsDetails" roleURI="http://www.globalpower.com/role/DisclosureOtherSupplementalInformationOtherCurrentAssetsDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureOtherSupplementalInformationOtherCurrentLiabilitiesDetails" roleURI="http://www.globalpower.com/role/DisclosureOtherSupplementalInformationOtherCurrentLiabilitiesDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureOtherSupplementalInformationOtherLongTermAssetsDetails" roleURI="http://www.globalpower.com/role/DisclosureOtherSupplementalInformationOtherLongTermAssetsDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <roleRef xlink:type="simple" xlink:href="wlms-20220930.xsd#DisclosureOtherSupplementalInformationOtherLongTermLiabilitiesDetails" roleURI="http://www.globalpower.com/role/DisclosureOtherSupplementalInformationOtherLongTermLiabilitiesDetails" xmlns="http://www.xbrl.org/2003/linkbase"/> |
| <calculationLink xlink:role="http://www.globalpower.com/role/StatementCondensedConsolidatedBalanceSheets" xlink:type="extended" xlink:title="00100 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets" xlink:label="Assets"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent_638040592933585213"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Assets" xlink:to="us-gaap_AssetsCurrent_638040592933585213" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_638040592933585213"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent_638040592933585213" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_638040592933585213" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_638040592933585213"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent_638040592933585213" xlink:to="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_638040592933585213" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent_638040592933585213"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent_638040592933585213" xlink:to="us-gaap_AccountsReceivableNetCurrent_638040592933585213" order="3" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerAssetNetCurrent" xlink:label="us-gaap_ContractWithCustomerAssetNetCurrent_638040592933585213"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent_638040592933585213" xlink:to="us-gaap_ContractWithCustomerAssetNetCurrent_638040592933585213" order="4" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="us-gaap_OtherAssetsCurrent_638040592933585213"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent_638040592933585213" xlink:to="us-gaap_OtherAssetsCurrent_638040592933585213" order="5" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:label="us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_638040592933595207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Assets" xlink:to="us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_638040592933595207" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill_638040592933595207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Assets" xlink:to="us-gaap_Goodwill_638040592933595207" order="3" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_638040592933595207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Assets" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill_638040592933595207" order="4" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent_638040592933595207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Assets" xlink:to="us-gaap_OtherAssetsNoncurrent_638040592933595207" order="5" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="LiabilitiesAndStockholdersEquity"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities_638040592933595207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_Liabilities_638040592933595207" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent_638040592933595207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_638040592933595207" xlink:to="us-gaap_LiabilitiesCurrent_638040592933595207" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent_638040592933595207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent_638040592933595207" xlink:to="us-gaap_AccountsPayableCurrent_638040592933595207" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_638040592933595207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent_638040592933595207" xlink:to="us-gaap_EmployeeRelatedLiabilitiesCurrent_638040592933595207" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_638040592933605206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent_638040592933595207" xlink:to="us-gaap_ContractWithCustomerLiabilityCurrent_638040592933605206" order="3" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="us-gaap_ShortTermBorrowings_638040592933605206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent_638040592933595207" xlink:to="us-gaap_ShortTermBorrowings_638040592933605206" order="4" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent_638040592933605206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent_638040592933595207" xlink:to="us-gaap_LongTermDebtCurrent_638040592933605206" order="5" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent" xlink:label="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_638040592933605206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent_638040592933595207" xlink:to="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_638040592933605206" order="6" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="us-gaap_OtherLiabilitiesCurrent_638040592933605206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent_638040592933595207" xlink:to="us-gaap_OtherLiabilitiesCurrent_638040592933605206" order="7" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent_638040592933605206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_638040592933595207" xlink:to="us-gaap_LongTermDebtNoncurrent_638040592933605206" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_638040592933605206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_638040592933595207" xlink:to="us-gaap_OtherLiabilitiesNoncurrent_638040592933605206" order="3" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent" xlink:label="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_638040592933615206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_638040592933595207" xlink:to="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_638040592933615206" order="4" use="optional" weight="1" priority="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet_638040592933615206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_638040592933595207" xlink:to="us-gaap_DeferredIncomeTaxLiabilitiesNet_638040592933615206" order="5" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity_638040592933615206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_StockholdersEquity_638040592933615206" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue_638040592933615206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity_638040592933615206" xlink:to="us-gaap_CommonStockValue_638040592933615206" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_638040592933615206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity_638040592933615206" xlink:to="us-gaap_AdditionalPaidInCapitalCommonStock_638040592933615206" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_638040592933615206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity_638040592933615206" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_638040592933615206" order="3" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_638040592933615206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity_638040592933615206" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_638040592933615206" order="4" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockCommonValue" xlink:label="us-gaap_TreasuryStockCommonValue_638040592933625207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity_638040592933615206" xlink:to="us-gaap_TreasuryStockCommonValue_638040592933625207" order="5" use="optional" weight="-1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/StatementCondensedConsolidatedStatementsOfOperations" xlink:type="extended" xlink:title="00200 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="NetIncomeLoss"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="us-gaap_IncomeLossFromContinuingOperations_638040592933625207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="NetIncomeLoss" xlink:to="us-gaap_IncomeLossFromContinuingOperations_638040592933625207" order="1" use="optional" weight="1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_638040592933625207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperations_638040592933625207" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_638040592933625207" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss_638040592933625207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_638040592933625207" xlink:to="us-gaap_OperatingIncomeLoss_638040592933625207" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="us-gaap_OperatingExpenses_638040592933625207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingIncomeLoss_638040592933625207" xlink:to="us-gaap_OperatingExpenses_638040592933625207" order="1" use="optional" weight="-1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="us-gaap_SellingAndMarketingExpense_638040592933625207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses_638040592933625207" xlink:to="us-gaap_SellingAndMarketingExpense_638040592933625207" order="1" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense_638040592933635207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses_638040592933625207" xlink:to="us-gaap_GeneralAndAdministrativeExpense_638040592933635207" order="2" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="us-gaap_DepreciationAndAmortization_638040592933635207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses_638040592933625207" xlink:to="us-gaap_DepreciationAndAmortization_638040592933635207" order="3" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GrossProfit" xlink:label="us-gaap_GrossProfit_638040592933635207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingIncomeLoss_638040592933625207" xlink:to="us-gaap_GrossProfit_638040592933635207" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_638040592933635207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_GrossProfit_638040592933635207" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_638040592933635207" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="us-gaap_CostOfGoodsAndServicesSold_638040592933635207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_GrossProfit_638040592933635207" xlink:to="us-gaap_CostOfGoodsAndServicesSold_638040592933635207" order="2" use="optional" weight="-1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="us-gaap_NonoperatingIncomeExpense_638040592933635207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_638040592933625207" xlink:to="us-gaap_NonoperatingIncomeExpense_638040592933635207" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_638040592933635207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NonoperatingIncomeExpense_638040592933635207" xlink:to="us-gaap_InterestIncomeExpenseNonoperatingNet_638040592933635207" order="1" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_638040592933635207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NonoperatingIncomeExpense_638040592933635207" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_638040592933635207" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit_638040592933645207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperations_638040592933625207" xlink:to="us-gaap_IncomeTaxExpenseBenefit_638040592933645207" order="2" use="optional" weight="-1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_638040592933645207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="NetIncomeLoss" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_638040592933645207" order="2" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/StatementCondensedConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="extended" xlink:title="00300 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="ComprehensiveIncomeNetOfTax"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss_638040592933645207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_NetIncomeLoss_638040592933645207" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_638040592933645207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_638040592933645207" order="2" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/StatementCondensedConsolidatedStatementsOfCashFlows" xlink:type="extended" xlink:title="00500 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_638040592933645207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_638040592933645207" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_638040592933645207" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss_638040592933645207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_NetIncomeLoss_638040592933645207" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_638040592933655206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_638040592933655206" order="2" use="optional" weight="-1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_638040592933655206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_638040592933655206" order="3" use="optional" weight="1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization_638040592933655206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_DepreciationDepletionAndAmortization_638040592933655206" order="4" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="us-gaap_AmortizationOfFinancingCosts_638040592933655206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_AmortizationOfFinancingCosts_638040592933655206" order="5" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_638040592933655206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium_638040592933655206" order="6" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="us-gaap_ProvisionForDoubtfulAccounts_638040592933655206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_ProvisionForDoubtfulAccounts_638040592933655206" order="7" use="optional" weight="1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation_638040592933655206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_ShareBasedCompensation_638040592933655206" order="8" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_638040592933655206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_638040592933655206" order="9" use="optional" weight="-1" priority="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerAsset" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerAsset_638040592933665208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_IncreaseDecreaseInContractWithCustomerAsset_638040592933665208" order="10" use="optional" weight="-1" priority="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentAssets_638040592933665208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_IncreaseDecreaseInOtherCurrentAssets_638040592933665208" order="11" use="optional" weight="-1" priority="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_638040592933665208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_638040592933665208" order="12" use="optional" weight="1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_638040592933665208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_638040592933665208" order="13" use="optional" weight="1" priority="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_638040592933665208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_638040592933665208" order="14" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets" xlink:label="us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_638040592933665208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_638040592933645207" xlink:to="us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_638040592933665208" order="15" use="optional" weight="-1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_638040592933665208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_638040592933645207" xlink:to="us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_638040592933665208" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_638040592933665208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_638040592933665208" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_638040592933675208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities_638040592933665208" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_638040592933675208" order="1" use="optional" weight="-1" priority="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_638040592933675208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_638040592933675208" order="3" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_638040592933675208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities_638040592933675208" xlink:to="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_638040592933675208" order="1" use="optional" weight="-1" priority="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_638040592933675208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities_638040592933675208" xlink:to="us-gaap_PaymentsOfDebtIssuanceCosts_638040592933675208" order="2" use="optional" weight="-1" priority="6"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromShortTermDebt" xlink:label="us-gaap_ProceedsFromShortTermDebt_638040592933675208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities_638040592933675208" xlink:to="us-gaap_ProceedsFromShortTermDebt_638040592933675208" order="3" use="optional" weight="1" priority="5"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfShortTermDebt" xlink:label="us-gaap_RepaymentsOfShortTermDebt_638040592933675208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities_638040592933675208" xlink:to="us-gaap_RepaymentsOfShortTermDebt_638040592933675208" order="4" use="optional" weight="-1" priority="5"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt_638040592933685209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities_638040592933675208" xlink:to="us-gaap_RepaymentsOfLongTermDebt_638040592933685209" order="5" use="optional" weight="-1" priority="6"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_638040592933685209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_638040592933685209" order="4" use="optional" weight="1"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureLeasesLeaseCostDetails" xlink:type="extended" xlink:title="40402 - Disclosure - LEASES - Lease Cost (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseCost" xlink:label="us-gaap_LeaseCost"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:label="us-gaap_OperatingLeaseCost_638040592933685209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LeaseCost" xlink:to="us-gaap_OperatingLeaseCost_638040592933685209" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermLeaseCost" xlink:label="us-gaap_ShortTermLeaseCost_638040592933685209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LeaseCost" xlink:to="us-gaap_ShortTermLeaseCost_638040592933685209" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubleaseIncome" xlink:label="us-gaap_SubleaseIncome_638040592933685209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LeaseCost" xlink:to="us-gaap_SubleaseIncome_638040592933685209" order="3" use="optional" weight="-1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureLeasesRightOfUseAssetsAndLeaseLiabilitiesDetails" xlink:type="extended" xlink:title="40403 - Disclosure - LEASES - Right-of use Assets and Lease Liabilities (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_LeaseLiability" xlink:label="wlms_LeaseLiability"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_LeaseLiabilityCurrent" xlink:label="wlms_LeaseLiabilityCurrent_638040592933695212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="wlms_LeaseLiability" xlink:to="wlms_LeaseLiabilityCurrent_638040592933695212" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_LeaseLiabilityNonCurrent" xlink:label="wlms_LeaseLiabilityNonCurrent_638040592933695212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="wlms_LeaseLiability" xlink:to="wlms_LeaseLiabilityNonCurrent_638040592933695212" order="2" use="optional" weight="1"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureLeasesRemainingLeasePaymentsDetails" xlink:type="extended" xlink:title="40405 - Disclosure - LEASES - Remaining Lease Payments (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_638040592933695212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_638040592933695212" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_638040592933695212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_638040592933695212" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_638040592933695212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_638040592933695212" order="3" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_638040592933695212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_638040592933695212" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_638040592933695212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_638040592933695212" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_638040592933695212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_638040592933695212" order="3" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_638040592933705206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_638040592933705206" order="4" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" xlink:label="wlms_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour_638040592933705206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="wlms_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour_638040592933705206" order="5" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_638040592933705206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_638040592933705206" order="6" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureLeasesRemainingLeasePaymentsDetailsCalc2" xlink:type="extended" xlink:title="40405 - Disclosure - LEASES - Remaining Lease Payments (Details) - Calc - 2" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiability" xlink:label="us-gaap_FinanceLeaseLiability_638040592933705206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:to="us-gaap_FinanceLeaseLiability_638040592933705206" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="us-gaap_OperatingLeaseLiability_638040592933705206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_OperatingLeaseLiability_638040592933705206" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_638040592933705206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_638040592933705206" order="2" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureChangesInBusinessDiscontinuedOperationAndDispositionDetails" xlink:type="extended" xlink:title="40501 - Disclosure - CHANGES IN BUSINESS - Discontinued Operation and Disposition (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation" xlink:label="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent" xlink:label="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_638040592933715209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation" xlink:to="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_638040592933715209" order="1" use="optional" weight="1" priority="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent" xlink:label="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_638040592933715209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation" xlink:to="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_638040592933715209" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_DisposalGroupIncludingDiscontinuedOperationLiabilityForUncertainTaxPositionsNoncurrent" xlink:label="wlms_DisposalGroupIncludingDiscontinuedOperationLiabilityForUncertainTaxPositionsNoncurrent_638040592933715209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_638040592933715209" xlink:to="wlms_DisposalGroupIncludingDiscontinuedOperationLiabilityForUncertainTaxPositionsNoncurrent_638040592933715209" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationPensionPlanBenefitObligationNoncurrent" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationPensionPlanBenefitObligationNoncurrent_638040592933715209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_638040592933715209" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationPensionPlanBenefitObligationNoncurrent_638040592933715209" order="2" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureChangesInBusinessDetailsCalc2" xlink:type="extended" xlink:title="40501 - Disclosure - CHANGES IN BUSINESS (Details) calc2" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:label="us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_638040592933715209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:to="us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_638040592933715209" order="1" use="optional" weight="-1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_638040592933715209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:to="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_638040592933715209" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_638040592933715209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_638040592933715209" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_638040592933715209" order="1" use="optional" weight="-1" priority="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax" xlink:label="us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_638040592933725208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_638040592933715209" xlink:to="us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_638040592933725208" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_638040592933725208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_638040592933715209" xlink:to="us-gaap_InterestIncomeExpenseNonoperatingNet_638040592933725208" order="3" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureRevenueContractAssetsAndContractLiabilitiesDetails" xlink:type="extended" xlink:title="40602 - Disclosure - REVENUE - Contract assets and the contract liabilities (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_UncompletedContractsCostIncurredAndEarningsRecognized" xlink:label="wlms_UncompletedContractsCostIncurredAndEarningsRecognized"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_CostsIncurredOnUncompletedContracts" xlink:label="wlms_CostsIncurredOnUncompletedContracts_638040592933725208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="wlms_UncompletedContractsCostIncurredAndEarningsRecognized" xlink:to="wlms_CostsIncurredOnUncompletedContracts_638040592933725208" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_EarningsRecognizedOnUncompletedContracts" xlink:label="wlms_EarningsRecognizedOnUncompletedContracts_638040592933725208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="wlms_UncompletedContractsCostIncurredAndEarningsRecognized" xlink:to="wlms_EarningsRecognizedOnUncompletedContracts_638040592933725208" order="2" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureRevenueDetailsCalc3" xlink:type="extended" xlink:title="40604 - Disclosure - REVENUE (Details) Calc 3" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_UncompletedContractsCostIncurredAndEarningsRecognizedNetOfBilling" xlink:label="wlms_UncompletedContractsCostIncurredAndEarningsRecognizedNetOfBilling"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_638040592933725208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="wlms_UncompletedContractsCostIncurredAndEarningsRecognizedNetOfBilling" xlink:to="us-gaap_ContractWithCustomerLiabilityCurrent_638040592933725208" order="1" use="optional" weight="-1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerAssetNetCurrent" xlink:label="us-gaap_ContractWithCustomerAssetNetCurrent_638040592933725208"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="wlms_UncompletedContractsCostIncurredAndEarningsRecognizedNetOfBilling" xlink:to="us-gaap_ContractWithCustomerAssetNetCurrent_638040592933725208" order="2" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureEarningsLossPerShareDetails" xlink:type="extended" xlink:title="40701 - Disclosure - EARNINGS (LOSS) PER SHARE (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="WeightedAverageNumberOfDilutedSharesOutstanding"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_638040592933735212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_638040592933735212" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_638040592933735212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_638040592933735212" order="2" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureDebtDetails" xlink:type="extended" xlink:title="40901 - Disclosure - DEBT (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent_638040592933735212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebtNoncurrent_638040592933735212" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount_638040592933735212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LongTermDebtNoncurrent_638040592933735212" xlink:to="us-gaap_DebtInstrumentCarryingAmount_638040592933735212" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_638040592933735212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LongTermDebtNoncurrent_638040592933735212" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_638040592933735212" order="2" use="optional" weight="-1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet" xlink:label="us-gaap_DeferredFinanceCostsNoncurrentNet_638040592933735212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LongTermDebtNoncurrent_638040592933735212" xlink:to="us-gaap_DeferredFinanceCostsNoncurrentNet_638040592933735212" order="3" use="optional" weight="-1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtCurrent" xlink:label="us-gaap_DebtCurrent_638040592933735212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_DebtCurrent_638040592933735212" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent_638040592933735212"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DebtCurrent_638040592933735212" xlink:to="us-gaap_LongTermDebtCurrent_638040592933735212" order="1" use="optional" weight="1"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureOtherSupplementalInformationOtherCurrentAssetsDetails" xlink:type="extended" xlink:title="41301 - Disclosure - OTHER SUPPLEMENTAL INFORMATION - Other current assets (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="us-gaap_OtherAssetsCurrent"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsMiscellaneousCurrent" xlink:label="us-gaap_OtherAssetsMiscellaneousCurrent_638040592933745209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="us-gaap_OtherAssetsMiscellaneousCurrent_638040592933745209" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_UnamortizedCommercialInsurancePremiumsCurrent" xlink:label="wlms_UnamortizedCommercialInsurancePremiumsCurrent_638040592933745209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="wlms_UnamortizedCommercialInsurancePremiumsCurrent_638040592933745209" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="us-gaap_PrepaidExpenseCurrent_638040592933745209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="us-gaap_PrepaidExpenseCurrent_638040592933745209" order="3" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_LitigationSettlementReceivableCurrent" xlink:label="wlms_LitigationSettlementReceivableCurrent_638040592933745209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="wlms_LitigationSettlementReceivableCurrent_638040592933745209" order="4" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepositsAssetsCurrent" xlink:label="us-gaap_DepositsAssetsCurrent_638040592933745209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="us-gaap_DepositsAssetsCurrent_638040592933745209" order="5" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_SalesTaxReceivableCurrent" xlink:label="wlms_SalesTaxReceivableCurrent_638040592933745209"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="wlms_SalesTaxReceivableCurrent_638040592933745209" order="6" use="optional" weight="1"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureOtherSupplementalInformationOtherCurrentLiabilitiesDetails" xlink:type="extended" xlink:title="41302 - Disclosure - OTHER SUPPLEMENTAL INFORMATION - Other current liabilities (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="OtherLiabilitiesCurrent"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_LeaseLiabilityCurrent" xlink:label="wlms_LeaseLiabilityCurrent_638040592933755206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="OtherLiabilitiesCurrent" xlink:to="wlms_LeaseLiabilityCurrent_638040592933755206" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_CloudComputingSoftwareLiability" xlink:label="wlms_CloudComputingSoftwareLiability_638040592933755206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="OtherLiabilitiesCurrent" xlink:to="wlms_CloudComputingSoftwareLiability_638040592933755206" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_AccruedFabricatorAndOtherJobCostsCurrent" xlink:label="wlms_AccruedFabricatorAndOtherJobCostsCurrent_638040592933755206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="OtherLiabilitiesCurrent" xlink:to="wlms_AccruedFabricatorAndOtherJobCostsCurrent_638040592933755206" order="3" use="optional" weight="1" priority="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_638040592933755206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="OtherLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_638040592933755206" order="4" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_AccruedStockCompensationLiability" xlink:label="wlms_AccruedStockCompensationLiability_638040592933755206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="OtherLiabilitiesCurrent" xlink:to="wlms_AccruedStockCompensationLiability_638040592933755206" order="5" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesAndExciseTaxPayableCurrent" xlink:label="us-gaap_SalesAndExciseTaxPayableCurrent_638040592933755206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="OtherLiabilitiesCurrent" xlink:to="us-gaap_SalesAndExciseTaxPayableCurrent_638040592933755206" order="6" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_638040592933755206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="OtherLiabilitiesCurrent" xlink:to="us-gaap_AccruedProfessionalFeesCurrent_638040592933755206" order="7" use="optional" weight="1"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureOtherSupplementalInformationOtherLongTermAssetsDetails" xlink:type="extended" xlink:title="41303 - Disclosure - OTHER SUPPLEMENTAL INFORMATION - Other long-term assets (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="us-gaap_EquityMethodInvestments_638040592933755206"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_EquityMethodInvestments_638040592933755206" order="1" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_RightOfUseAsset" xlink:label="wlms_RightOfUseAsset_638040592933765207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="wlms_RightOfUseAsset_638040592933765207" order="2" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_638040592933765207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_UnamortizedDebtIssuanceExpense_638040592933765207" order="3" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_UnamortizedCloudComputingSoftware" xlink:label="wlms_UnamortizedCloudComputingSoftware_638040592933765207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="wlms_UnamortizedCloudComputingSoftware_638040592933765207" order="4" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_OtherLongTermAssets" xlink:label="wlms_OtherLongTermAssets_638040592933765207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="wlms_OtherLongTermAssets_638040592933765207" order="5" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| <calculationLink xlink:role="http://www.globalpower.com/role/DisclosureOtherSupplementalInformationOtherLongTermLiabilitiesDetails" xlink:type="extended" xlink:title="41304 - Disclosure - OTHER SUPPLEMENTAL INFORMATION - Other long-term liabilities (Details)" xmlns="http://www.xbrl.org/2003/linkbase"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_LeaseLiabilityNonCurrent" xlink:label="wlms_LeaseLiabilityNonCurrent_638040592933765207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherLiabilitiesNoncurrent" xlink:to="wlms_LeaseLiabilityNonCurrent_638040592933765207" order="1" use="optional" weight="1"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_OtherLongTermLiabilities" xlink:label="wlms_OtherLongTermLiabilities_638040592933765207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherLiabilitiesNoncurrent" xlink:to="wlms_OtherLongTermLiabilities_638040592933765207" order="2" use="optional" weight="1" priority="2"/> |
| | <loc xlink:type="locator" xlink:href="wlms-20220930.xsd#wlms_UnrecognizedTaxBenefitsIncomeTaxPenaltiesInterestExpenseContinuingOperation" xlink:label="wlms_UnrecognizedTaxBenefitsIncomeTaxPenaltiesInterestExpenseContinuingOperation_638040592933765207"/> |
| | <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OtherLiabilitiesNoncurrent" xlink:to="wlms_UnrecognizedTaxBenefitsIncomeTaxPenaltiesInterestExpenseContinuingOperation_638040592933765207" order="3" use="optional" weight="1" priority="2"/> |
| | </calculationLink> |
| </link:linkbase> |