Which government agency is primarily responsible for overseeing personnel security in the U.S.?

The United States Department of Defense (DoD) is primarily responsible for overseeing personnel security in the U.S., particularly in relation to national security and military operations. The DoD manages the security clearance processes essential for ensuring that individuals with access to sensitive information and positions are trustworthy and reliable.

The DoD develops policies and guidelines regarding personnel security investigations and clearance determinations, which are critical for maintaining the integrity of operations that protect national interests. This includes implementing standards for the investigation of background checks, adjudication processes, and ongoing evaluations of personnel with security clearances.

While other agencies like the FBI, CIA, and DHS play significant roles in their specific domains, such as law enforcement and intelligence gathering, the DoD holds the leading role in structuring and enforcing personnel security measures within the military and related defense sectors. Their comprehensive approach to personnel security is vital for safeguarding classified information and maintaining operational security within the defense community.