APPLICANTS MUST SUBMIT AN ONLINE APPLICATION THROUGH THE LIBRARY'S WEB SITE. mhklibrary.org/job-openings/. __________________________. Manhattan Public Library. Job Description. Job title: Custodian Salary grade: C. Department: Maintenance Reports to: Maintenance Manager. Exempt: No Supervisory responsibilities: No. Summary. Helps to make the library a welcoming place for a diverse community by performing cleaning duties. Custodians ensure the bu...