What does a Cleaner do?
Janitors keep buildings such as schools, office spaces, hospitals, retail stores, and residential buildings clean and in good condition. Their primary responsibility is as a cleaner, but in many cases janitors also perform security and maintenance tasks. While most janitors work indoors, some work outdoors part of the time, for example removing snow or sweeping walkways.
A formal education is not required. Most janitors hold a high school degree. The work can be physically demanding and many janitors work evening hours because office buildings and schools are typically cleaned when they are empty.