The main job of a guard is to serve at the pleasure of the client or the company (some security teams are in-house). Some guards will stand at a post for hours on end and observe and report activity, hours may sit at a desk/console and have more of a customer service aspect to their job on top of performing rounds and equipment checks.Security is flexible and can change depending on the location, the account, criminal activity and chances for criminal activity and budget of the client.There is no 1 main job of security.Yes a Security guard guards something or someone that they are assig...