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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 More About Our Mission

Agency News

View Introducing DCSA's first agency video

The Defense Counterintelligence and Security Agency has released its first agency video, outlining our mission, vision and values. DCSA is at the forefront of safeguarding trust in our federal workforce, in our workspaces and our classified IT systems and data. While our efforts may not always be...

Nov. 6, 2024

View DCSA leaders honor Lockheed Martin with Jack Donnelly Award for Excellence in Counterintelligence

Andrew Lochli, Defense Counterintelligence and Security Agency assistant director for Counterintelligence and Insider Threat, presents the 2023 Jack Donnelly Award for Excellence in Counterintelligence to Robert Trono, Lockheed Martin Corp. vice president and chief security officer.

BETHESDA, Md. - Defense Counterintelligence and Security Agency (DCSA) leaders recognized Lockheed Martin Corp. as a national leader in counterintelligence while presenting the 2023 Jack Donnelly Award for Excellence in Counterintelligence to the company’s senior officials on Oct. 23. “This award...

Oct. 28, 2024

View DCSA hosts U.S. Representative Abigail Spanberger for Fireside Chat

DCSA Director William Cattler hosts Virigina Representative Abigail Sanbeger for a VIP meeting and DCSA TownHall Fireside Chat at the DCSA headquarters in the Russell-Knox building, Quantico, Va., Oct. 21, 2024 (DOD photo by Christopher P. Gillis).

QUANTICO, Va. — The Defense Counterintelligence and Security Agency (DCSA) hosted U.S. Representative Abigail Spanberger during a Fireside Chat on Oct. 21 at DCSA headquarters. The event provided an opportunity for agency leaders and employees to engage with Spanberger, a former intelligence officer...