Here are some good Links I found
California State Private Investigator Resources
Rominger Legal California Private Investigations Directory - Find an Investigator serving the State of California.
California Association of Licensed Investigators - The CALI web site provides information to the public as well as sections and information for members of the California Association of Licensed Investigators
California Bureau of Security and Investigative Services - Regulates Investigators in California
Private Investigator Requirements for Licensure - An Investigator in California must be licensed. According to the State of California; "A private investigator is an individual who (1) investigates crimes, (2) investigates the identity, business, occupation, character, etc., of a person, (3) investigates the location of lost or stolen property, (4) investigates the cause of fires, losses, accidents, damage or injury, or (5) secures evidence for use in court. Private investigators may protect persons only if such services are incidental to an investigation; they may not protect property. An individual, partnership, or corporation licensed as a private investigator may employ a qualified manager to manage the business on a day-to-day basis. To be eligible to apply for licensure as a private investigator/qualified manager, you must meet the following requirements" -
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