Naval Criminal Investigative Service
- The Naval Criminal Investigative Service (NCIS) is an elite worldwide federal law enforcement organization whose mission is to protect and serve the Navy and Marine Corps and their families. NCIS has approximately 1600 employees, 850 of whom are civilian
- http://www.ncis.navy.mil/

Department of the Navy Information and Personnel Security Programs
- handles investigations and background checks to insure personell in positions of trust can be allowed access to restricted information.
- http://www.navysecurity.navy.mil/