MANT ManTech International Corporation

ManTech (Nasdaq: MANT) today announced a $45 million four-year award for the Naval Surface Warfare Center (NSWC) Crane for technical advancement of sensors used by Naval Air Systems Command (NAVAIR) in Hawkeye aircraft (PMA-231).  The award was under the Department of Defense Information Analysis Center (DoD IAC), Defense Systems Technical Area Task (DS TAT), Multiple Award Contract issued by the Air Force Installation Contracting Agency.

U.S. Navy Hawkeye

Often called “the eyes of the fleet,” PMA-231 Hawkeye aircraft use integrated, automated sensors to provide surveillance, identification and tracking of threat aircraft and cruise missile systems, and to ensure situational awareness. ManTech will leverage its DoD-wide experience with sensor integration and support as well as agile software engineering and development techniques to advance sensor performance in rapid-fire sprints and accelerate the delivery of vital intelligence.

“ManTech’s agile approach to sensor development and platform integration will drive efficiency, add flexibility for adopting emerging technologies and lead the way to new capabilities that enhance the U.S. Navy warfighter’s mission,” said Kevin M. Phillips, President and CEO of ManTech.

About DoD IAC ProgramThe DoD IAC program operates as a part of Defense Technical Information Center and provides technical data management and research support for DoD and federal government users. Established in the 1940s, the IAC program serves the DoD science & technology (S&T) and acquisition communities to drive innovation and technological developments by enhancing collaboration through integrated scientific and technical information development and dissemination for the DoD and broader S&T community.

About ManTech International CorporationManTech provides mission-focused technology solutions and services for U.S. defense, intelligence community and federal civilian agencies. Now in our 50th year, we excel in full-spectrum cyber, data collection & analytics, enterprise IT, systems and software engineering solutions that support national and homeland security. Additional information on ManTech can be found at www.mantech.com.

Statements in this press release that do not directly and exclusively relate to historical facts constitute “forward-looking statements” within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to risks, uncertainties and other factors, many of which are outside of our control, and could cause actual results to differ materially from those we anticipate. For a written description of these factors, see the section titled “Risk Factors” in our most recent Annual Report on Form 10-K, as well as any updating information in our subsequent filings with the SEC. The forward-looking statements speak only as of the date hereof, and we disclaim any obligation to update them, whether as a result of a subsequent event or otherwise.

ManTech-C

Media Contacts:

Jim Crawford                                     Executive Director, External Communications(O) 703.259.3636 (M) 571.446.7550 James.Crawford2@ManTech.com Sue CushingVice President, Corporate Marketing & Communications(O) 703.814.8369 (M) 703.927.1482Sue.Cushing@ManTech.com

A photo accompanying this announcement is available at http://www.globenewswire.com/NewsRoom/AttachmentNg/531509e8-e67e-4f30-8c2e-d880af9ddaf6