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| <xsd:import namespace="http://fasb.org/us-gaap/2017-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd"/> |
| <xsd:import namespace="http://fasb.org/us-roles/2017-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2017/elts/us-roles-2017-01-31.xsd"/> |
| <xsd:import namespace="http://fasb.org/us-types/2017-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2017/elts/us-types-2017-01-31.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/> |
| <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/> |
| <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/currency/2017-01-31" schemaLocation="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/dei/2014-01-31" schemaLocation="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/exch/2017-01-31" schemaLocation="http://xbrl.sec.gov/exch/2017/exch-2017-01-31.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/naics/2017-01-31" schemaLocation="http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd"/> |
| <xsd:import namespace="http://xbrl.sec.gov/stpr/2011-01-31" schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd"/> |
| <xsd:annotation> |
| | <xsd:appinfo> |
| | | <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="vsec-20180331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/> |
| | | <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="vsec-20180331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/> |
| | | <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="vsec-20180331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/> |
| | | <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="vsec-20180331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/> |
| | | <link:roleType id="BusinessSegmentsAndCustomerInformation" roleURI="http://www.vsecorp.com/role/BusinessSegmentsAndCustomerInformation"> |
| <link:definition> 2107100 - Disclosure - Business Segments and Customer Information </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="BusinessSegmentsAndCustomerInformationDetails" roleURI="http://www.vsecorp.com/role/BusinessSegmentsAndCustomerInformationDetails"> |
| <link:definition> 2407402 - Disclosure - Business Segments and Customer Information (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="BusinessSegmentsAndCustomerInformationMajorCustomersDetails" roleURI="http://www.vsecorp.com/role/BusinessSegmentsAndCustomerInformationMajorCustomersDetails"> |
| <link:definition> 2407403 - Disclosure - Business Segments and Customer Information, Major Customers (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="BusinessSegmentsAndCustomerInformationTables" roleURI="http://www.vsecorp.com/role/BusinessSegmentsAndCustomerInformationTables"> |
| <link:definition> 2307301 - Disclosure - Business Segments and Customer Information (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="CommitmentsAndContingencies" roleURI="http://www.vsecorp.com/role/CommitmentsAndContingencies"> |
| <link:definition> 2106100 - Disclosure - Commitments and Contingencies </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="CommitmentsAndContingenciesDetails" roleURI="http://www.vsecorp.com/role/CommitmentsAndContingenciesDetails"> |
| <link:definition> 2406401 - Disclosure - Commitments and Contingencies - (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="Debt" roleURI="http://www.vsecorp.com/role/Debt"> |
| <link:definition> 2104100 - Disclosure - Debt </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="DebtDetails" roleURI="http://www.vsecorp.com/role/DebtDetails"> |
| <link:definition> 2404401 - Disclosure - Debt (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="DocumentAndEntityInformation" roleURI="http://www.vsecorp.com/role/DocumentAndEntityInformation"> |
| <link:definition> 0001000 - Document - Document and Entity Information </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="EarningsPerShare" roleURI="http://www.vsecorp.com/role/EarningsPerShare"> |
| <link:definition> 2105100 - Disclosure - Earnings Per Share </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="EarningsPerShareDetails" roleURI="http://www.vsecorp.com/role/EarningsPerShareDetails"> |
| <link:definition> 2405402 - Disclosure - Earnings Per Share (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="EarningsPerShareTables" roleURI="http://www.vsecorp.com/role/EarningsPerShareTables"> |
| <link:definition> 2305301 - Disclosure - Earnings Per Share (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="FairValueMeasurements" roleURI="http://www.vsecorp.com/role/FairValueMeasurements"> |
| <link:definition> 2109100 - Disclosure - Fair Value Measurements </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="FairValueMeasurementsDetails" roleURI="http://www.vsecorp.com/role/FairValueMeasurementsDetails"> |
| <link:definition> 2409402 - Disclosure - Fair Value Measurements (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="FairValueMeasurementsNarrativeDetails" roleURI="http://www.vsecorp.com/role/FairValueMeasurementsNarrativeDetails"> |
| <link:definition> 2409403 - Disclosure - Fair Value Measurements - Narrative (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="FairValueMeasurementsTables" roleURI="http://www.vsecorp.com/role/FairValueMeasurementsTables"> |
| <link:definition> 2309301 - Disclosure - Fair Value Measurements (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillAndIntangibleAssets" roleURI="http://www.vsecorp.com/role/GoodwillAndIntangibleAssets"> |
| <link:definition> 2108100 - Disclosure - Goodwill and Intangible Assets </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillAndIntangibleAssetsDetails" roleURI="http://www.vsecorp.com/role/GoodwillAndIntangibleAssetsDetails"> |
| <link:definition> 2408402 - Disclosure - Goodwill and Intangible Assets (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillAndIntangibleAssetsTables" roleURI="http://www.vsecorp.com/role/GoodwillAndIntangibleAssetsTables"> |
| <link:definition> 2308301 - Disclosure - Goodwill and Intangible Assets (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="IncomeTaxes" roleURI="http://www.vsecorp.com/role/IncomeTaxes"> |
| <link:definition> 2110100 - Disclosure - Income Taxes </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="IncomeTaxesDetails" roleURI="http://www.vsecorp.com/role/IncomeTaxesDetails"> |
| <link:definition> 2410401 - Disclosure - Income Taxes (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="NatureOfBusinessAndBasisOfPresentation" roleURI="http://www.vsecorp.com/role/NatureOfBusinessAndBasisOfPresentation"> |
| <link:definition> 2101100 - Disclosure - Nature of Business and Basis of Presentation </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="NatureOfBusinessAndBasisOfPresentationAsc606Details" roleURI="http://www.vsecorp.com/role/NatureOfBusinessAndBasisOfPresentationAsc606Details"> |
| <link:definition> 2401404 - Disclosure - Nature of Business and Basis of Presentation - ASC 606 (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="NatureOfBusinessAndBasisOfPresentationDetails" roleURI="http://www.vsecorp.com/role/NatureOfBusinessAndBasisOfPresentationDetails"> |
| <link:definition> 2401403 - Disclosure - Nature of Business and Basis of Presentation (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="NatureOfBusinessAndBasisOfPresentationPolicies" roleURI="http://www.vsecorp.com/role/NatureOfBusinessAndBasisOfPresentationPolicies"> |
| <link:definition> 2201201 - Disclosure - Nature of Business and Basis of Presentation (Policies) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="NatureOfBusinessAndBasisOfPresentationTables" roleURI="http://www.vsecorp.com/role/NatureOfBusinessAndBasisOfPresentationTables"> |
| <link:definition> 2301302 - Disclosure - Nature of Business and Basis of Presentation - (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="RecentlyIssuedAccountingPronouncementsNotYetAdopted" roleURI="http://www.vsecorp.com/role/RecentlyIssuedAccountingPronouncementsNotYetAdopted"> |
| <link:definition> 2111100 - Disclosure - Recently Issued Accounting Pronouncements Not Yet Adopted </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="Revenue" roleURI="http://www.vsecorp.com/role/Revenue"> |
| <link:definition> 2103100 - Disclosure - Revenue </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="RevenueDetails" roleURI="http://www.vsecorp.com/role/RevenueDetails"> |
| <link:definition> 2403402 - Disclosure - Revenue (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="RevenueNarrativeDetails" roleURI="http://www.vsecorp.com/role/RevenueNarrativeDetails"> |
| <link:definition> 2403403 - Disclosure - Revenue - Narrative (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="RevenuePerformanceObligationsDetails" roleURI="http://www.vsecorp.com/role/RevenuePerformanceObligationsDetails"> |
| <link:definition> 2403404 - Disclosure - Revenue - Performance Obligations (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="RevenueTables" roleURI="http://www.vsecorp.com/role/RevenueTables"> |
| <link:definition> 2303301 - Disclosure - Revenue (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="UnauditedConsolidatedBalanceSheets" roleURI="http://www.vsecorp.com/role/UnauditedConsolidatedBalanceSheets"> |
| <link:definition> 1001000 - Statement - Unaudited Consolidated Balance Sheets </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="UnauditedConsolidatedBalanceSheetsParenthetical" roleURI="http://www.vsecorp.com/role/UnauditedConsolidatedBalanceSheetsParenthetical"> |
| <link:definition> 1001501 - Statement - Unaudited Consolidated Balance Sheets (Parenthetical) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="UnauditedConsolidatedStatementsOfCashFlows" roleURI="http://www.vsecorp.com/role/UnauditedConsolidatedStatementsOfCashFlows"> |
| <link:definition> 1004000 - Statement - Unaudited Consolidated Statements of Cash Flows </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="UnauditedConsolidatedStatementsOfComprehensiveIncome" roleURI="http://www.vsecorp.com/role/UnauditedConsolidatedStatementsOfComprehensiveIncome"> |
| <link:definition> 1003000 - Statement - Unaudited Consolidated Statements of Comprehensive Income </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="UnauditedConsolidatedStatementsOfIncome" roleURI="http://www.vsecorp.com/role/UnauditedConsolidatedStatementsOfIncome"> |
| <link:definition> 1002000 - Statement - Unaudited Consolidated Statements of Income </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | </xsd:appinfo> |
| | </xsd:annotation> |
| <xsd:element id="vsec_AccumulatedImpairmentLoss" name="AccumulatedImpairmentLoss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/> |
| <xsd:element abstract="true" id="vsec_AmendedAndRestatedMember" name="AmendedAndRestatedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_AviationAcquisitionsMember" name="AviationAcquisitionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_AviationLitigationMember" name="AviationLitigationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_CommercialAviationMember" name="CommercialAviationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_CommercialMember" name="CommercialMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_CostTypeContractMember" name="CostTypeContractMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_DepartmentofDefenseMember" name="DepartmentofDefenseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_FederalGroupMember" name="FederalGroupMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="vsec_IncomeTaxExpenseBenefitonInterestRateSwap" name="IncomeTaxExpenseBenefitonInterestRateSwap" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_ItEnergyAndManagementConsultingGroupMember" name="ItEnergyAndManagementConsultingGroupMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="vsec_LongTermLeaseObligation" name="LongTermLeaseObligation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/> |
| <xsd:element id="vsec_LongTermLeaseObligations" name="LongTermLeaseObligations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/> |
| <xsd:element id="vsec_LossContingencyNumberofPlaintiffDeaths" name="LossContingencyNumberofPlaintiffDeaths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/> |
| <xsd:element id="vsec_LossContingencyNumberofPlaintiffsInjured" name="LossContingencyNumberofPlaintiffsInjured" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/> |
| <xsd:element id="vsec_MutualFundsHeldInDscPlanFairValueDisclosure" name="MutualFundsHeldInDscPlanFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/> |
| <xsd:element abstract="true" id="vsec_OtherCommercialMember" name="OtherCommercialMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_OtherGovernmentMember" name="OtherGovernmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="vsec_RevenueRemainingPerformanceObligationPercentage" name="RevenueRemainingPerformanceObligationPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/> |
| <xsd:element id="vsec_RevenuefromContractswithCustomerNumberofContracts" name="RevenuefromContractswithCustomerNumberofContracts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/> |
| <xsd:element abstract="true" id="vsec_RevolvingLoanFacilityMember" name="RevolvingLoanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="vsec_RevolvingLoansPotentialIncrementinMaximumBorrowingCapacity" name="RevolvingLoansPotentialIncrementinMaximumBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_SupplyChainManagementGroupMember" name="SupplyChainManagementGroupMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_TermLoanFacilityMember" name="TermLoanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_TotalDepartmentOfDefenseMember" name="TotalDepartmentOfDefenseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_U.S.PostalServicesMember" name="U.S.PostalServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_USAirForceMember" name="USAirForceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_USArmyArmyReserveMember" name="USArmyArmyReserveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="vsec_USNavyMember" name="USNavyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| </xsd:schema> |