ManTech Awarded $51.3 Million Engineering Services Contract from the N

    Business Editors/Defense Writers

    FAIRFAX, Va.--(BUSINESS WIRE)--Jan. 10, 2005--ManTech International Corporation (Nasdaq:MANT), a leading provider of innovative technologies and solutions focused on mission-critical national security programs for the Department of Defense, the Intelligence Community, the Department of State, the Department of Justice, the Department of Homeland Security and other U.S. federal government customers, announced today that it has been awarded a contract from the Naval Sea Systems Command (NAVSEA) to provide engineering and technical support services for the Submarine and Surface Ship Signature Silencing Program at the Naval Surface Warfare Center Carderock Division (NSWCCD). The five-year contract has a total potential value of $51.3 million.
    Under the competitively awarded task order through NAVSEA's streamlined SeaPort Enhanced Multiple Award Contract, ManTech will provide technical and logistic support for submarine and surface ship signature measurement trials. This includes data collection, testing, analysis, operations, maintenance, logistics, and repair services. Work will be performed at NSWCCD Bremerton Detachment and ManTech facilities in Bremerton, Washington.
    "We have more than 30 years experience supporting and developing superior stealth technologies through signature control and silencing for submarine and surface ships," said Kenneth J. Farquhar, President, ManTech Systems Engineering Corporation. "Our engineers and scientists provide the Naval Surface Warfare Center with critical acoustic support, which greatly reduces the vulnerability of Navy vessels to mines, torpedoes and other dangers."
    ManTech Systems Engineering Corporation is an independently assessed SW-CMM Level 3 company.

    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 Department of Defense, the Intelligence Community, the Department of State, the Department of Justice, the Department of Homeland Security and other U.S. federal government customers. ManTech's expertise includes 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 is helping the Department of Justice's U.S. Marshall Service deploy a common, office automation system. With projected annual revenues in excess of $800 million for 2004 and more than 5,500 highly qualified employees and several thousand consultants, the company operates in the United States and more than 30 countries worldwide. In 2004, ManTech was selected by Business Week magazine as one of the Top 100 Hot Growth Companies and was ranked as one of the Top 50 Fastest-Growing Solution Providers by VARBusiness magazine. 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. These factors include but are not limited to: the failure of the Government allot funds to complete performance of the task order awarded to ManTech, or exercise task order options; risks of task order performance; risks of task order termination by the Government, either for default or for the convenience of the U.S. government; risks associated with complex U.S. government procurement laws and regulations; 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. These and other risk factors are more fully discussed in 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 15, 2004, 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.

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CONTACT: ManTech International Corporation, Fairfax Mark Root, 703-218-8397 cell: 703-407-9393 mark.root@mantech.com or Maureen Crystal, 703-218-8262 maureen.crystal@mantech.com

KEYWORD: VIRGINIA DISTRICT OF COLUMBIA INDUSTRY KEYWORD: HARDWARE AEROSPACE/DEFENSE GOVERNMENT TRANSPORTATION SOFTWARE MARKETING AGREEMENTS SOURCE: ManTech International Corporation

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