Working independently and as part of the Facilities Department, the School Maintenance Assistant responds professionally to maintenance needs and helps provide a clean, safe, welcoming, and faith-filled environment for students, staff, parishioners, families, and visitors. The Archdiocese of Chicago, the third largest in the United States, serves more than 2.2 million Catholics in 216 parishes in Cook County and Lake County, a geographic area of 1,411 square miles.