A professional who investigates source of alarm and trouble signals on subscribers' premises, as recorded in central station of electrical protective signaling system. Respnsibilities include:

• Drives radio-equipped car to subscriber's establishment, and locates source of alarm.
• Investigates disturbances, such as unlawful intrusion, fires, and property damage.
• Apprehends unauthorized persons found on property, using armed force if necessary, and releases them to custody of authorities.
• Contacts supervisor by radio or telephone to report irregularities and obtain further instructions.
• Adjusts and repairs subscriber's signaling equipment to restore service, using handtools.
• Coordinates activities with police and fire departments during alarms.
• Writes investigation and automobile usage reports.