Anteon Awarded Contract to Support Naval Aviation Programs.

FAIRFAX, Va. -- Anteon International Corporation (NYSE:ANT) announced today it has been awarded a task order by the Naval Air Systems Command (NAVAIR) to support U.S. Navy aviation training programs. The value of this 51-month task order, if all options are exercised is $16.7M. It was awarded under a previously announced, NAVAIR multiple award contract that has a ceiling of $460M.

Under this task order, Anteon will provide program management and technical engineering services in support of a number of U.S. Navy aircraft and related systems training programs. Such services include assessing user training requirements, conducting technical analyses to support improvements in flight simulators and maintenance trainers, and validating the Naval Aviation Training Assessment Management System technical design and operations.

Dan Johnson, Anteon Executive Vice President and COO stated, "Anteon has a long history with this NAVAIR customer, providing aviation training support services for over 25 years. We are excited about this latest award and look forward to continuing this partnership to address the mission-critical training needs of the naval air community."

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 8,600 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.