He has taught at New York University and John Jay College of Criminal Justice in New York City and is currently an associate professor at the Chicago School of Professional Psychology. Dr. Harrington is the chair of the Institutional Review Board (IRB) at his college, and is a member of the Illinois Criminal Justice Information Authority IRB committee. While a graduate student at Temple University Dr. Harrington conducted extensive research at the False Memory Syndrome Foundation in Philadelphia, which he presented at the 1995 NATO Advanced Studies Institute international conference on traumatic memories. His research explores issues related to the ideology of Supreme Court justices, research ethics, and accusations of child abuse.