California Bureau of Security & Investigative Services
http://www.dca.ca.gov/bsis/

Department of Homeland Security
http://www.dhs.gov/index.shtm

California Secretary of State
http://www.ss.ca.gov/

California Department of Consumer Affairs
http://www.dca.ca.gov/

CALSAGA
http://www.calsaga.org/

California Law
http://www.leginfo.ca.gov/calaw.html

License Search for Security Guard
Link