Mission
The NCIS mission is to investigate and defeat criminal, terrorist, and foreign intelligence threats to the United States Navy and Marine Corps-ashore, afloat, and in cyberspace.
Publications 

Security Education Publications

Aug 2010 - DSS RELEASES NEW OPSEC AWARENESS FOR MILITARY MEMBERS, DOD EMPLOYEES AND CONTRACTORS COURSE (GS130.16)DSS OPSEC AWARENESS FOR MILITARY MEMBERSDSS OPSEC AWARENESS FOR MILITARY MEMBERS.pdf
Bomb Threats and Physical Security Planningbombthreatsbombthreats.pdf
CO/XO Information & Personnel Security Reference HandbookCO XO HandbookCO XO Handbook.pdf
DoD Initial Security IndoctrinationInitial Security BriefingInitial Security Briefing.pdf
DSS Security Education, Training and Awareness (SETA) Handbookseta-handbookseta-handbook.pdf

Publication Resources

Office of the National Counterintelligence Executive (NCIX) Publicationshttp://www.ncix.gov/publications/index.html
Security Education Posters (offered by NCMS)http://www.ncms-channelislands.org/posters.html
SETA Broadcase News - Video & Multimediahttps://dssacdsws.dss.mil/news/anews.htm
National Opsec Programhttps://www.iad.gov/ioss/
This is an official U.S. Navy web site.
Naval Criminal Investigative Service
27130 Telegraph Road, Quantico, VA 22134