As a contract security guard, you complete your responsibilities on an independent or freelance basis. You may be employed to patrol and protect a private, residential, or commercial building. Your duties are to patrol the area, protect the property, and ensure everyone is safe. You may be hired for the duration of a project or during staff shortages. You patrol during the day or at night, depending on the job. A contract security guard may complete an assignment as an individual or work with other contracted guards.