ManTech Awarded $13.25 Million Contract from the DOD Logistics Enterprise Support Program for Joint Strike Fighter Support.

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 been awarded a contract from the Department of Defense, Defense Logistics Agency, Logistics Enterprise Support Program for the Joint Strike Fighter (JSF) Single Point of Entry (SPOE) Operational Prototype. The competitively awarded contract is for one year, and has four option years for a total potential value to ManTech of $13.25 million.

JSF is the next generation strike fighter that will be operated by U.S. Air Force, Navy, Marine Corps and eight foreign partners. "The JSF SPOE program provides maximum security, flexibility, and horizontal scalability within an open architecture framework," said Ken Farquhar, President of ManTech Systems Engineering Corporation. "The provision for real-time virtual information exchange capability among DOD, agencies, and contractors - will directly support our warfighters."

ManTech will provide a concept of operations and operational architecture for an advanced technology-enabled strategy to improve acquisition and material visibility for the Joint Strike Fighter. This effort will produce a framework for JSF deployment that will shorten repair time and lower life cycle costs. ManTech is working on a related effort for DOD involving the Army H-60 Black Hawk helicopter. ManTech services will include the application of the Service-Oriented Enterprise and Product Life Cycle Support international standards - along with the development of business information objects. SPOE is a web services capability compliant with the Office of the Secretary of Defense net centric operations that provides two-way visibility into air platform material requirements and produces high-state information interoperability among supply chain participants.

ManTech also supports the JSF program by providing a full dimension of integrated security support services including physical and information security, anti-tamper solutions, technology assessment, certification and accreditation, foreign disclosure and systems security engineering.

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 over 6,000 highly qualified employees, the company operates in the United States and over 44 countries worldwide. In 2005, Red Herring magazine selected ManTech as one of its Small Cap 100 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 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.