ManTech International (MANT)

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.

Election of Directors

Effective October 4, 2006, the Board of Directors of ManTech International Corporation, Inc. (the “Company”) elected Mary K. Bush as a new member of the Company’s Board of Directors. Prior to Ms. Bush’s election, the Board voted to increase the size of the Board of Directors by one member. The Board is now comprised of eleven members.

At the time of this filing, the Board of Directors has not yet determined on which Board committees, if any, Ms. Bush will serve.

A copy of the October 11, 2006 press release announcing the election of Ms. Bush is attached as Exhibit 99.1 to this Current Report on Form 8-K.

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.

On July 31, 2006, the Company’s Board of Directors appointed Mr. John J. Fitzgerald to serve as the Company’s Principal Accounting Officer. Mr. Fitzgerald was also promoted to Senior Vice President – Finance and Controller. Prior to being named Senior Vice President – Finance and Controller, Mr. Fitzgerald served as Senior Vice President and Controller for ManTech, overseeing the corporate finance and accounting organization. Mr. Fitzgerald joined ManTech in April 2004. From 1997 to 2003, Mr. Fitzgerald was Vice President and Controller at DynCorp, a provider of diversified management, technical and professional services to a wide range of government customers that had over 23,000 employees and over $2.4 billion in annual sales.