A security guard (also known as a security inspector or protective agent) is a person employed by a public or private party to protect the employing party's assets (property, people, equipment, money, etc.) from a variety of hazards (such as waste, damaged property, unsafe worker behavior, criminal activity such as theft, etc.) by enforcing preventative measures. Security guards do this by maintaining a high-visibility presence to deter illegal and inappropriate actions, looking (either directly, through patrols, or indirectly, by monitoring alarm systems or video surveillance cameras) for si...
Source: Wikipedia (as of 04/18/2019). Read more from Wikipedia