# Defense Counterintelligence and Security Agency **Aliases:** DCSA **Entity class:** Department of Defense agency ## Definition The **Defense Counterintelligence and Security Agency (DCSA)** performs personnel vetting, industrial-security oversight, counterintelligence, and security training functions for the Department of Defense and other customers. ## Relationships - **administers industrial-security infrastructure:** [[wiki/National Industrial Security Program|NISP]]. - **operates:** [[wiki/National Industrial Security Program Contract Classification System|NCCS]]. - **supports:** personnel vetting and the [[wiki/National Security Population|national-security population]]. - **department:** [[wiki/United States Department of Defense|Department of Defense]]. ## Sources / Provenance - [DCSA — About Us](https://www.dcsa.mil/About-Us/) - [DCSA — NCCS](https://www.dcsa.mil/About-Us/Leadership/National-Industrial-Security-Program-NISP-Contract-Classification-System-NCCS/)