Mantech International Corp – ‘S-1/A’ on 1/2/02 – EX-16.1

On:  Wednesday, 1/2/02   ·   Accession #:  928385-1-502972   ·   File #:  333-73946

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Pre-Effective Amendment to Registration Statement (General Form)   —   Form S-1
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: S-1/A       Am. #1 to the Form S-1                               119    578K 
 2: EX-2.1      Plan of Merger                                         6     25K 
 3: EX-3.1      Certificate of Incorporation                          14     57K 
 4: EX-3.2      Bylaws of the Registrant                              16     68K 
 5: EX-4.2      Loan and Security Agreement                          102    418K 
 6: EX-10.5     Promissory Notes                                       3     17K 
 7: EX-10.8     Material Contract                                     68    470K 
 8: EX-16.1     Pricewaterhousecooper Letter                           2     10K 
 9: EX-23.2     Consent                                                1      6K 
10: EX-23.3     Consent                                                1      6K 

EX-16.1   —   Pricewaterhousecooper Letter
Exhibit Table of Contents

EX-16.1
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                                                                    Exhibit 16.1

December 31, 2001                                                               

Securities and Exchange Commission                                              
450 Fifth Street, N.W.                                                          
Washington, D.C. 20549                                                          

Commissioners:                                                                  

We have read the statements under the caption "Change in Independent Auditors"  
made by ManTech International Corporation (the Company) (copy attached), which  
we understand will be filed with the Commission, pursuant to Item 304 of        
Regulation S-K, as part of the Company's Registration Statement on Form S-1     
dated December 31, 2001. We agree with the statements concerning our Firm under 
such caption in the Form S-1.                                                   

Very truly yours,                                                               

/s/ PricewaterhouseCoopers LLP                                                  

PricewaterhouseCoopers LLP                                                      

EX-16.1
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Change in Independent Auditors                                                  

     In July 1999, we determined to change our independent auditors from
PricewaterhouseCoopers LLP, to Deloitte & Touche LLP. In connection with        
PricewaterhouseCoopers LLP's audits of our financial statements for the years   
ended December 31, 1997 and 1998 and through July 1999, there were no           
disagreements with PricewaterhouseCoopers LLP on any matter of accounting       
principles or practices, financial statement disclosure, or auditing scope or   
procedure, nor any reportable events. The reports of PricewaterhouseCoopers LLP 
on the financial statements for the years ended December 31, 1997 and 1998      
contained no adverse opinion or disclaimer of opinion and were not qualified or 
modified as to uncertainty, audit scope or accounting principle. The decision to
change auditors was approved by our board of directors. We have provided        
PricewaterhouseCoopers LLP with a copy of the disclosure contained in this      
section of this prospectus.                                                     

Dates Referenced Herein   and   Documents Incorporated by Reference

				Referenced-On Page
This ‘S-1/A’ Filing		Date		First		Last			Other Filings
Filed on:		1/2/02
		12/31/01		1					10-K
		12/31/98		2
		12/31/97		2
									List all Filings