Professor Gillen has a J.D. an Ph.D. in American History from the University of Notre Dame. Before joining the faculty at the Ave Maria School of Law, he served as a judicial clerk for Hon. Robert D. Potter of the United States District Court for the Western District of North Carolina and the Hon. Daniel A. Manion of the United States Court of Appeals for the Seventh Circuit, and he practiced in the area of civil litigation, including civil rights litigation. Professor Gillen has expertise in Appellate Practice, Federal Courts, Civil Rights, and Constitutional Law.