ManTech Names Robert P. Frisbie as Senior Vice President in Its Mission, Cyber and Technology Solutions Group

ManTech International Corporation (Nasdaq: MANT) has named Robert P. Frisbie as Senior Vice President in its Mission, Cyber and Technology Solutions group. Mr. Frisbie will be responsible for the security support and special military programs business areas, and for business development efforts in Afghanistan.

Prior to joining ManTech Mr. Frisbie was the Senior Vice President, Defense Sector, STG Inc. responsible for defense and intelligence programs including those in Korea, Qatar, Hawaii and Europe. At Northrop Grumman he was the Vice President and Director for the Information Operations and Net-Centric Defense operating unit which focused on cyber, information assurance and intelligence support. He also served as the Vice President for Northrop Grumman TASC Cyber, directing one of the company’s largest information operations programs and threat analysis, vulnerability assessment and information protection initiatives. At QuesTech Inc. he was the Director of Strategic Planning responsible for establishing their Information Warfare group.

Before entering private industry, Mr. Frisbie was the Deputy Director of the U.S. Army Communications Electronics Command Intelligence and Electronic Warfare Directorate where he established the first Army Information Warfare Special Program Office, helped develop Army doctrine in information warfare and provided engineering support for all of the Army tactical signals intelligence, electronic warfare and intelligence fusion programs. He also served as the National Military Command Center Communications Officer for the Joint Chiefs of Staff, J6 Directorate, responsible for the National Military Command System and its connectivity with SATCOM, HF, UHF and commercial communications systems. Mr. Frisbie was the Senior Test Manager for national level, interagency C3 programs for the Command Systems Integration Agency.

"Bob brings years of experience and familiarity with many of our current clients, and a strong knowledge of our business,” said Bill Varner, President, ManTech Mission, Cyber and Technology Solutions group. "Bob has always been focused on the client’s mission first, and will bring strong leadership to a critical area of the business for ManTech.”

Mr. Frisbie received a master of science degree in Operations Research/Systems Analysis from the Naval Postgraduate School; and a bachelor of science degree in Electrical Engineering from Virginia Military Institute.

About ManTech International Corporation:

Headquartered in Fairfax, Virginia with approximately 8,000 professionals, 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; National Oceanic and Atmospheric Administration; and other U.S. federal government customers. ManTech’s expertise includes systems engineering, systems integration, software development services, enterprise architecture, cyber security, information assurance, intelligence operations and analysis support, network and critical infrastructure protection, information operations and information warfare support, information technology, communications integration, global logistics and supply chain management, and service oriented architectures. The company supports the advanced telecommunications systems that are used in Operation Iraqi Freedom and in other parts of 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 40 countries. In 2008, BusinessWeek magazine chose ManTech for its ‘InfoTech 100’ listing representing the best performing tech companies in the world; Forbes.com named ManTech as one of the 400 Best Big Companies in the nation; and A-Space, a Web 2.0 enhanced collaboration tool that ManTech developed for the Intelligence Community was named one of the Top 50 Inventions of the Year by Time magazine. Also in 2008, GI Jobs magazine named ManTech a Top Ten Military Friendly Employer for the third year in a row. 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 retain existing U.S. government contracts, win new contracts, or win recompetes; adverse results of U.S. government audits of our government contracts; risks associated with complex U.S. government procurement laws and regulations; adverse effect of contract consolidations; risk of contract performance or termination; failure to obtain option awards, task orders or funding under contracts; adverse changes in our mix of contract types; 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 identify, execute or effectively integrate future acquisitions; risks of financing, such as increases in interest rates and restrictions imposed by our credit agreement; risks related to an inability to obtain new or additional financing; 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 February 27, 2009, 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.