Building cleaning workers in large office and residential buildings often work in teams consisting of workers who specialize in vacuuming, picking up trash, and cleaning rest rooms, among other things. Supervisors conduct inspections to ensure that the building is cleaned properly and the team is functioning efficiently.

Building cleaning workers usually work inside heated, well-lighted buildings. However, they sometimes work outdoors, sweeping walkways, mowing lawns, or shoveling snow. Working with machines can be noisy, and some tasks, such as cleaning bathrooms and trash rooms, can be dirty and unpleasant. Janitors may suffer cuts, bruises, and burns from machines, handtools, and chemicals. They spend most of their time on their feet, sometimes lifting or pushing heavy furniture or equipment. Many tasks, such as dusting or sweeping, require constant bending, stooping, and stretching. As a result, janitors also may suffer back injuries and sprains.