The Archdiocese of Chicago is the third largest diocese in the United States and serves more than 2.2 million Catholics in The Archdiocese, pastored by Cardinal Blase J. Cupich, has more than 15,000 employees across its ministries, including Catholic Charities, the region’s largest nonprofit social service agency. As one of the largest private school systems in the nation with approximately 148 schools across Cook and Lake Counties, we are not just committed to our students’ success, but also your professional and spiritual success.