Anteon Sets Earnings Release Date for Q3 2004 Results.

FAIRFAX, Va. -- Anteon International Corporation (NYSE:ANT) today announced that it will release its third-quarter fiscal year 2004 financial results on October 27, 2004, at 7:30 a.m. EDT. Following the release of the information, the Company has scheduled a conference call for 10:00 a.m. EDT.

Hosted by Anteon senior management, the conference call will be webcast simultaneously through a link on the Investor Relations section of the company's Website, located at www.anteon.com. A replay of the conference call also will be available by telephone starting at 1:00 p.m. EDT through October 30, 2004, at [phone] or [phone] (international). The conference call identification number is 1143524. A replay of the webcast will be available on the Anteon Website from approximately one hour after the conclusion of the conference call through November 27, 2004.

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.