A private patrol operator (PPO) operates a business that protects persons or property or prevents theft. They generally employ security guards. In order for a company to become licensed the manager of the company must pass a licensing examination. In addition, each individual applicant, partner, or corporate officer must be eighteen years or older, undergo a criminal history background check and not have committed any violations of the California Private Security Services Act that would be grounds for license suspension or revocation.
References
Private Patrol Operator Wikipedia(Text) CC BY-SA