Anteon Sets Earnings Release Date for Q3 2005 Results

Hosted by Anteon senior management, the conference call will bewebcast simultaneously through a link on the Investor Relationssection of the Company's Website, located at www.anteon.com. A replayof the conference call will also be available by telephone starting at1:00 p.m. EDT through November 02, 2005, at (877) 519-4471 or (973)341-3080 (international). The conference call identification number is6568554. A replay of the webcast will be available on the AnteonWebsite from approximately one hour after the conclusion of theconference call through November 02, 2005.

About Anteon

Anteon, headquartered in Fairfax, Virginia, is a leadinginformation technology company serving the U.S. Federal government andinternational customers. Anteon designs, integrates, maintains, andupgrades state-of-the-art systems for national defense, intelligence,homeland security, and other high priority government missions. Anteonprovides numerous government clients with the systems integration,strategy and program management, systems engineering, operationsservices, and simulation and training skills necessary to manage thedevelopment and operations of their mission critical systems. TheCompany was founded in 1976 and currently employs over 9,300 employeesin more than 100 offices worldwide. Anteon consistently ranks amongthe top information technology integrators based on independentsurveys, and has been named to the Forbes List of the 400 Best BigCompanies in 2005, earning distinction on the Forbes Platinum List.Anteon is listed on the Standards & Poor's MidCap 400 Index. For moreinformation, visit www.anteon.com.