We ask that interested candidates complete a full application online at. https://www.applitrack.com/central51/onlineapp/JobPostings/view.asp. FromAdmin=true&AppliTrackJobId=1487. OR go to www.central51.net and select the Employment/HR page to find the link to the application. Custodian. Hours 7:00am - 3:00pm. QUALIFICATIONS. Minimum of high school diploma or GED equivalent. Previous experience in building and cleaning maintenance preferred. Illin...