Job Description. A cleaning staff or janitorial personnel is responsible for keeping offices and other public areas neat and organized. Their main duties include sweeping, mopping and vacuuming floors, dusting countertops, taking out the trash, cleaning appliances, and dusting ceilings and furniture and sanitizing bathrooms, kitchens or other public areas. Job Responsibilites. Dust, vacuum, and mop all floors within the building. Empty trash and ...