Anteon Awarded Major Contract to Support U.S. Navy Shipboard Maintenance Programs.

FAIRFAX, Va. -- Anteon International Corporation (NYSE:ANT), a leading information technology and systems engineering and integration company, announced today that it was awarded a five-year contract by the Naval Shipbuilding Support Office to support Naval Sea Systems Command (NAVSEA) and Fleet sponsored maintenance programs. The ceiling on this ID/IQ contract, if all options are exercised, is approximately $870 million.

Under this contract, Anteon will provide engineering and technical services to support U.S. Navy maintenance and modernization programs involving shipboard equipment and systems on all classes of ships and watercraft. Anteon is one of seven companies to be awarded a contract.

Joseph M. Kampf, Anteon President and CEO stated, "Anteon is proud of its past support to the Naval Sea Systems Command, Fleet Commanders and other Navy-sponsored shipbuilding modernization programs. Under this latest contract award, we will compete for work to support a number of U.S. Navy systems that are critical to this nation's readiness and defense."

About Anteon

Anteon, headquartered in Fairfax, Virginia, is a leading information technology and engineering solutions company providing support to the federal government and international sectors. For over 28 years, the Company has designed, integrated, maintained and upgraded state-of-the-art systems for national defense, intelligence, emergency response and other high priority government missions. Anteon also provides many of its government clients with the systems analysis, integration and program management skills necessary to manage the development and operations of their mission critical systems. The Company currently has approximately 8,500 employees in more than 100 offices worldwide. Anteon consistently ranks among the top information technology integrators based on independent surveys. Anteon was cited by Forbes Magazine, in 2004, as one of the 25 fastest growing technology companies and named one of the world's top 100 information technology companies in Business Week's INFOTECH 100 Annual Report for the last two consecutive years. For more information, visit www.anteon.com.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995

The statements contained in this release which are not historical facts are forward-looking statements that are subject to risks and uncertainties that could cause actual results to differ materially from those set forth in, or implied by, forward-looking statements. The Company has tried, whenever possible, to identify these forward-looking statements using words such as "projects," "anticipates," "believes," "estimates," "expects," "plans," "intends," and similar expressions. Similarly, statements herein that describe the Company's business strategy, outlook, objectives, plans, intentions or goals are also forward-looking statements. The risks and uncertainties involving forward-looking statements include the Company's dependence on continued funding of U.S. government programs, government contract procurement and termination risks including risks associated with protests, and other risks described in the Company's Securities and Exchange Commission filings. These statements reflect the Company's current beliefs and are based upon information currently available to it. Be advised that developments subsequent to this release are likely to cause these statements to become outdated with the passage of time.