text: I would say that, this will vary greatly by the location or site that the security guard is at. If he has a patrolling type site he would be required to check the doors of each building throughout the night to insure they are secure as well as finding a B & E. He could be assigned to a car lot and then his job would be mainly to make sure no cars are stolen. He could be assigned to a construction site and his main duties would be to make sure no constructon equipment as well as building materials are not stolen. His duties may or should vary by job site.