Introduction: Services include the following:
* Patrol industrial and commercial premises to prevent and detect signs of intrusion and ensure security of doors, windows, and gates
* 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
* Write reports of daily activities and irregularities, such as equipment or property damage, theft, presence of unauthorized persons, or unusual occurrences
* Call police or fire departments in cases of emergency, such as fire or presence of unauthorized persons
* Circulate among visitors, patrons, and employees to preserve order and protect property