ManTech Wins Estimated $47.9M Contract to Support the Central Technical Support Facility at Fort Hood, Texas.

FAIRFAX, Va. -- ManTech International Corporation (Nasdaq:MANT), a leading provider of innovative technologies and solutions focused on 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, announced today that it has received a task order to support the Central Technical Support Facility (CTSF), Fort Hood, Texas. ManTech will support security, telecommunications, facilities management, logistics and inventory control management at the base, and also provide limited test and training assistance. The CTSF houses the integration, testing, and fielding support of the software on all Army Battle Command Systems. It is under the control of the Army Chief Information Officer and the Program Executive Officer Command, Control and Communications Tactical.

ManTech is a subcontractor to Computer Sciences Corporation for this task, under the Communications-Electronic Life Cycle Management Command, Strategic Services Sourcing contract. The competitively awarded task order, which has a three-year base, and one twelve-month option, has an estimated total potential value to ManTech of $47.9 million over four years.

"ManTech personnel have been supporting various functions at Fort Hood for approximately 25 years," said Robert Smith, Senior Vice President, C3 Systems, ManTech Defense Systems Group. "We take great pride in our past performance and the success we have had supporting that customer."

"The U.S. Army's command system transformation program is a central mission at Fort Hood and ManTech has been working with the Army on this effort since it began in earnest more than a decade ago," said Eugene C. Renzi, President of ManTech's Defense Systems Group, and ManTech Senior Executive Vice President. "We are uniquely qualified to support these activities at Fort Hood because of our knowledge of the operations at Fort Hood, our highly skilled personnel who are located on site and our broad expertise supporting integrated logistics; systems engineering; test and evaluation; Command, Control, Communications, Computers, Intelligence, Surveillance, and Reconnaissance (C4ISR), and other total sustainment solutions and services which support the Warfighter."

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. With approximately 6,000 highly qualified employees, 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, 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. Such forward-looking statements are subject to factors that could cause actual results to differ materially from those anticipated results. The factors that could cause actual results to differ materially from those indicated by such forward-looking statements include but are not limited to: the failure of the government to award task orders to ManTech, allot funds to complete performance of the task orders awarded to ManTech, or exercise contract options; the risk of contract performance; government contract procurement (such as bid protest) and termination risks; competitive factors such as pricing pressures and/or competition to hire and retain employees; and material changes in laws or regulations applicable to the Company's businesses. For a discussion of these and other risks and uncertainties, please refer to the section entitled "Risks Related to the Company's Business" in ManTech's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 10, 2006, 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 and Form 8-K. 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.