-To guard, patrol, or monitor premises to prevent theft, violence, or infractions of rules.

-Patrol premises to prevent and detect signs of intrusion and ensure security.

-Answer alarms and  investigate disturbances.

-Monitor and authorize entrance and departure of employees, visitors, and other persons to guard against theft and maintain security of premises.

-Call police or fire departments in case of emergency, such as fire or presence of unauthorized persons.

-Circulate among visitors, patrons, and employees to preserve order and protect property.

-Warn persons of rule infractions or violations, and apprehend or evict violators from premises, using force when necessary.