ManTech Receives the Department of Defense Cogswell Award for Maintaining Excellent Security at a Cleared Facility

ManTech International Corporation (Nasdaq:MANT) announced that it has been awarded the James S. Cogswell Outstanding Industrial Security Achievement Award for 2007 from the Defense Security Service (DSS). The Cogswell award is the most "prestigious” honor that DSS awards to a cleared facility and it is presented annually to companies that focus on industrial security excellence and maintain security programs that go beyond National Industrial Security Program requirements. ManTech was one of 30 companies to receive an award and was selected in a "rigorous” process that reviewed approximately 12,000 cleared contractor facilities supported by DSS. Facilities considered for the award must have a minimum of two consecutive superior industrial security review ratings and show a "sustained degree of excellence and innovation in their overall security program management, implementation and oversight,” according to DSS. The ManTech facility in Panama City, FL, which supports advanced acoustics efforts for the U.S. Navy, received the Cogswell award. Cheryl Myers, Facility Security Officer, ManTech Systems Engineering Corporation, oversees the security operations at the Panama City location. "My congratulations to Cheryl and the team in Panama City,” said Joyce Weymouth, Corporate Vice President of Security, ManTech International Corporation. "We support the tremendous dedication and commitment it took to maintain a security program to meet the extensive requirements for this award. Security is critical to our country and our customers and ManTech understands the important role security plays in the defense of our nation.” The Cogswell award, established in 1966, is named in honor of the late Air Force Col. James S. Cogswell, who was the first chief of the unified office of industrial security within the Department of Defense. "Col. Cogswell was responsible for developing the basic principles of the Industrial Security Program, which include an emphasis on the partnership between industry and government to protect classified information, which ultimately helps to ensure the protection of the U.S. fighter,” according to DSS. The Under Secretary of Defense for Intelligence provides authority, direction and control over DSS, which provides the military services, defense agencies, 23 federal agencies and approximately 12,000 cleared contractor facilities with security support services. About ManTech International Corporation: Headquartered in Fairfax, Virginia, ManTech International Corporation is a leading provider of innovative technologies and solutions for mission-critical national security programs for the Intelligence Community; the departments of Defense, State, Homeland Security, and Justice; the Space Community; and other U.S. federal government customers. ManTech’s expertise includes systems engineering, systems integration, technology and software development, enterprise security architecture, information assurance, intelligence operations support, network and critical infrastructure protection, information technology, communications integration and engineering support. The company supports the advanced telecommunications systems that are used in Operation Iraqi Freedom and in other parts of the world; provides the physical and cyber security to protect U.S. embassies all over the world; has developed a secure, collaborative communications system for the U.S. Department of Homeland Security; and builds and maintains secure databases that track terrorists. The company operates in the United States and over 40 countries worldwide. In 2005, Red Herring magazine selected ManTech as one of its Small Cap 100 Companies; and in 2006 and 2007, Business 2.0 magazine named ManTech one of its 100 Fastest Growing Technology Companies. Additional information on ManTech can be found at www.mantech.com. Forward-Looking Information: Statements and assumptions made in this press release, which do not address historical facts, constitute "forward-looking" statements that ManTech believes to be within the definition in the Private Securities Litigation Reform Act of 1995 and involve risks and uncertainties, many of which are outside of our control. Words such as "may,” "will,” "intends,” "should,” "expects,” "plans,” "projects,” "anticipates,” "believes,” "estimates,” "predicts,” "potential,” "continue,” or "opportunity," or the negative of these terms or words of similar import are intended to identify forward-looking statements. These forward-looking statements are subject to known and unknown risks and uncertainties, which could cause actual results to differ materially from those anticipated, including, without limitation: adverse changes in U.S. government spending priorities; failure to successfully integrate recently acquired companies or businesses into our operations or to realize any accretive or synergistic effects from such acquisitions; failure to retain existing U.S. government contracts, win new contracts, or win recompetes; adverse results of U.S. government audits of our government contracts; risk of contract performance or termination; adverse changes in our mix of contract types; failure to obtain option awards, task orders or funding under contracts; failure to identify, execute or effectively integrate future acquisitions; risks associated with complex U.S. government procurement laws and regulations; and competition. These and other risk factors are more fully discussed in the section entitled "Risks Factors " in ManTech's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 9, 2007, and, from time to time, in ManTech's other filings with the Securities and Exchange Commission, including among others, its reports on Form 10-Q. The forward-looking statements included in this news release are only made as of the date of this news release and ManTech undertakes no obligation to publicly update any of the forward-looking statements made herein, whether as a result of new information, subsequent events or circumstances, changes in expectations or otherwise.