Custodian cleans the buildings, equipment, and furnishings of businesses. As a business custodian, your responsibilities include ensuring the common areas, offices, and bathrooms are clean. You also maintain the cleaning equipment and ensure everything needed for cleaning the business is stocked and ready. Depending on your qualifications, you may have additional maintenance duties. Your job is to work with other members of the cleaning or custodial team to ensure the business is a clean and safe environment.