Job Summary Under supervision, maintain an assigned school building or office space in a clean and orderly condition; perform other work as required. Requirements / Qualifications The district is currently seeking custodian substitutes. If you are interested please submit a substitute application to Human Resources. Bonita Unified School District 115 W. Allen Ave. San Dimas, CA 91773 Below is a direct link to the application that will need to be printed out and completed.