Defense Security Service

The Defense Security Service (DSS) is a federal security agency of the United States Department of Defense (DoD). Within areas of DoD responsibility, DSS is tasked with facilitating personnel security investigations, supervising industrial security, and performing security education and awareness training. DSS is an authorized Federal Security Agency. Industrial Security Representatives and Information System Security Professionals are credentialed government agents. Originally known as the Defense Investigative Service (DIS), DIS was established in 1972. DSS changed from DIS in 1999.