Stationary or Patrol
Although all security guards have many of the same responsibilities, specific duties vary based on whether the guard works in a "stationary" security position or on a mobile patrol. All guards must become closely acquainted with the property they are protecting and the people associated with it. All security officers must show good judgment and common sense, follow directions and directives from supervisors, accurately testify in court, and follow company policy and guidelines. Guards should have a professional appearance and attitude and be able to interact with the public. They also must be able to take charge and direct others in emergencies or other dangerous incidents. In a large organization, the security manager is often in charge of a trained guard force divided into shifts; whereas in a small organization, a single worker may be responsible for all security.
Outside of their direct responsibility to protect their employer's property, employees, and customers, they are to observe and report what they see. Private security guards have no more legal power than an ordinary citizen; they may make "citizen's arrests" based on personal observation of a crime, but not simply based on the word of a third party.
Stationary guards generally work in the same area every day. Their duties would include manning posts at the entrance to a facility, checking people and vehicles entering and leaving the property, and monitoring alarms and closed-circuit TV cameras. Guards who work in public buildings such as museums or art galleries protect paintings and exhibits by inspecting people and packages entering and leaving the building. In factories, laboratories, government buildings, data processing centers, and military bases, security officers protect information, products, computer codes, and defense secrets and check the credentials of people and vehicles entering and leaving the premises. Guards working at universities, parks, and sports stadiums perform crowd control, supervise parking and seating, and direct traffic. Security guards stationed at the entrance to bars and places of adult entertainment, such as nightclubs, prevent access by minors, collect cover charges at the door, maintain order among customers, and protect property and patrons.
In office buildings, banks, and hospitals, guards maintain order and protect the institutions' property, staff, and customers. At air, sea, and rail terminals and other transportation facilities, guards protect people, freight, property, and equipment. They may screen passengers and visitors for weapons and explosives using metal detectors and high-tech equipment, ensure nothing is stolen while being loaded or unloaded, and watch for fires and criminals.
In contrast, guards assigned to mobile patrol duty drive or walk from location to location and conduct security checks within an assigned geographical zone. They may detain or arrest criminal violators, answer service calls concerning criminal activity or problems, and issue traffic violation warnings.
Armored car guards protect money and valuables during transit. In addition, they protect individuals responsible for making commercial bank deposits from theft or bodily injury. When the armored car arrives at the door of a business, an armed guard enters, signs for the money, and returns to the truck with the valuables in hand. Carrying money between the truck and the business can be extremely hazardous for guards. Because of this risk, armored car guards usually wear bullet-proof vests.
Specific job responsibilities also vary with the size, type, and location of the employer. In department stores, guards protect people, records, merchandise, money, and equipment. They often work with undercover store detectives to prevent theft by customers or store employees and help in the apprehension of shoplifting suspects prior to arrival of police. Some shopping centers and theaters have officers mounted on horses or bicycles who patrol their parking lots to deter car theft and robberies.