Job Summary. The. Overnight Custodian. will be responsible for the overall cleanliness of all areas of the facility to ensure a positive member experience. Essential Duties and Responsibilities. Thoroughly clean and sanitize restrooms, locker room areas, fitness equipment and gym floor. Stock locker rooms with proper supplies/paper products. Report any broken or missing amenities or equipment (Toilets, faucets, showers, hair dryers, gym equipment...