Anteon Awarded $47M Contract to Provide Program Management and Systems Engineering Support to U.S. Navy.

FAIRFAX, Va. -- Anteon International Corporation (NYSE:ANT), a leading information technology and systems engineering and integration company, announced today that it has been awarded a contract by the U.S. Naval Sea Systems Command (NAVSEA) to provide support to the Program Executive Office for Integrated Warfare Systems (PEO IWS). The estimated value of this five-year contract, if all options are exercised, is $47 million.

Anteon will provide program management, systems engineering, and financial management services in support of the PEO IWS Executive Office, PEO IWS Corporate and Financial Operations, and Advanced Concept Technology Demonstration (ACTD) efforts.

"This contract award offers Anteon the opportunity to further expand its comprehensive support to the Commander, Naval Sea Systems Command, affiliated Program Executive Offices and the Office of the Deputy Assistant Secretary of the Navy. We are proud to be an important part of the Navy's efforts to deliver enterprise solutions for Naval warfare systems that operate seamlessly and effectively within the Fleet and Joint Force," stated Dan Johnson, Anteon chief operating officer.

About Anteon

Anteon, headquartered in Fairfax, Virginia, is a leading systems integrator, providing information technology and engineering solutions to the federal government and international sectors. Anteon designs, integrates, maintains and upgrades 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 was founded in 1976 and has grown to currently employ over 8,800 employees in more than 100 offices worldwide. Anteon consistently ranks among the top information technology integrators based on independent surveys, and has been named to the Forbes List of the 400 Best Big Companies in 2005, earning distinction on the Forbes Platinum List. 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 bid 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. The Company does not currently intend, however, to update the guidance provided today prior to its next earnings release.