Security guards protect property from illegal entry, vandalism, theft, and fire.

Security guards' duties vary with the size, type, and location of their employer.

Security guards may patrol on foot or in a car. They patrol and inspect buildings and grounds. They check to see that windows, doors, and gates are locked. They make sure that security equipment is working correctly.

Guards who work in stores watch for theft by customers.

Guards in banks watch for robbers. Some drive armored vehicles to transport money or valuables safely to and from banks. Other guards drive and provide protection to their employers.

Guards in offices and factories check employee identification and answer visitor questions.

Airport guards may use screening equipment to detect the presence of guns or other illegal items.

Some guards patrol nightclubs and bars. They walk around and watch customers for signs of fighting. They warn customers when they are being too rowdy. Sometimes guards must evict customers.

Security guards record security information. They investigate alarms in emergencies and call the police or fire departments when necessary.