As an evening office cleaner, your job is to provide various cleaning services during an evening shift after most other employees have gone home. The definition of an evening shift for cleaning varies by company, but it usually involves starting after 2 PM and ending before midnight. In this role, you may work as a janitor to clean and sanitize areas, provide maintenance for the building, and otherwise help prepare the building for the next day. Many details of this job depend on the employer. For example, offices with a lot of foot traffic may emphasize cleaning the floors, while offices that go through a lot of supplies may have cleaners restock inventories.