EX-99.1 5 dex991.htm EXHIBIT 99.1 Exhibit 99.1
EXHIBIT 99.1
 
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
 
In connection with the ManTech International Corporation (the “Company”) Quarterly Report on Form 10-Q for the period ending September 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the “Report), I, George J. Pedersen, Chief Executive Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:
 
 
(1)
 
The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and
 
 
(2)
 
The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
 
This certificate is being made for the exclusive purpose of compliance by the Chief Executive Officer of the Company with the requirements of Section 906 of the Sarbanes-Oxley Act of 2002, and may not be disclosed, distributed or used by any person or for any reason other than as specifically required by law.
 
Date:  November 14, 2002
 
                    By:
  
/s/ George J. Pedersen
                    Name:
  
George J. Pedersen
                    Title:
  
Chairman of the Board of Directors, Chief Executive Officer and President