DIS meaning in Military and Defence ?

The Defense Counterintelligence and Security Agency (DCSA) is a federal security agency of the United States Department of Defense (DoD). Within areas of DoD responsibility, DCSA is tasked with conducting personnel security investigations, supervising industrial security, and performing security education and awareness training. DCSA Industrial Security Representatives, Background Investigators and Information System Security Professionals are credentialed Special Agents. The Director of DCSA reports to the Under Secretary of Defense for Intelligence. DCSA provides the uniformed US military services, Department of Defense Agencies, 33 other federal agencies, and approximately 13,500 cleared contractor facilities with security support services.