What is the purpose of the Defense Security Service (DSS)?

The Defense Security Service (DSS) is responsible for safeguarding U.S. national security by overseeing the security of defense-related information and managing personnel security for Department of Defense (DoD) contractors and facilities. It conducts background investigations, implements security training programs, and ensures compliance with federal security regulations. Additionally, DSS plays a crucial role in counterintelligence efforts and the protection of sensitive technologies from foreign espionage. Overall, its mission is to enhance the security posture of the defense industrial base.