DISS Update (9/15 2 PM EST): DISS is fully operational.

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 OCFO hosts Appropriations Law Training at Quantico

QUANTICO, Va. – The Office of the Chief Financial Officer (OCFO) of the Defense Counterintelligence and Security Agency (DCSA) hosted its first Appropriations Law Training Seminar at the Russell-Knox Building, Aug. 4-7, 2025. This four-day, instructor-led event marked a significant milestone in...

Sept. 12, 2025

View CDSE launches 2025 National Insider Threat Awareness Month website

The Center for Development of Security Excellence (CDSE), a training and education provider within the Defense Counterintelligence and Security Agency (DCSA), recently launched the 2025 National Insider Threat Awareness Month (NITAM) website. Since inception in 2019, NITAM provides a unique...

Sept. 4, 2025

View DCSA services transition to Cloud as part of TW 2.0

QUANTICO, Va. – The Defense Information System for Security (DISS) will begin migration to the cloud this weekend as part of the Defense Counterintelligence and Security Agency’s (DCSA) “Cloud Smart” strategy under the National Background Investigation Services (NBIS). This transition aligns with...