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America's Gatekeeper

DCSA is the largest security agency in the federal government dedicated to protecting America's trusted workforce and trusted workspaces.

Each year, DCSA services over

100+ federal entities
10,000+ cleared companies
2M+ background investigations

Learn About Our Mission - Watch The Agency Video

Agency News

View DCSA Director: DOD, government, industry and academia partnership with America’s Gatekeeper protects the nation’s trusted workforce, spaces, secrets

DITMAC Kicks off National Insider Threat Awareness Month with a symposium held at the Patent and Trademark Office building in Alexandria, Virginia on August 18-19, 2025. The theme for the event was

ALEXANDRIA, Va. – “The global threat environment is converging into kind of a perfect storm.” Defense Counterintelligence and Security Agency (DCSA) Director David Cattler explained his perception that a storm of such magnitude is brewing as he spoke to insider threat and security professionals from...

Aug. 22, 2025

View DCSA Security Conference for DOD offers exclusive Army breakout session

Army Breakout Session DCSA Security Conference for DOD

The Defense Counterintelligence and Security Agency (DCSA) is partnering with the U.S. Army to host an exclusive breakout session on Aug. 28 at the conclusion of the DCSA Security Conference for Department of Defense (DOD).

Aug. 6, 2025

View DITMAC and CDSE win 2025 intelligence community training and education award

Of all people – DoD Insider Threat Management and Analysis Center (DITMAC) Deputy Director Henry Nelson – knows that countering insider threats is a team sport. It’s still nice to be reminded, especially if it comes in the form of a prestigious intelligence community award. A Defense...