Through your constant presence, you guarantee the security of public areas, buildings, premises,... You are in charge of the security of people and belongings. You survey a restricted area or a large zone requiring regular patrols on foot or using a small means of transportation. You monitor the access and control the comings and goings.
You intervene when called upon or to prevent incidents. Depending on your job, you may be required to transport funds and be accompanied by an external agent or a guard dog. You may be required to perform first aid.