Detective Sergeant Sean Gilhooley started his law enforcement career with the Addison Police Department in 1996, serving as a Patrolman in the Field Services Division. His next assignment was with the Criminal Investigations Section where he served from 2001 to 2009. He was promoted to the rank of Sergeant in 2009.
In 2010, in addition to being a Sergeant in the Field Services Division, Detective Sergeant Gilhooley was a supervisor for the Community Response Unit for five years. In 2012, he became the Administrative Sergeant for one year. When his tour as Administrative Sergeant was completed, he returned to the Field Services Division for a short period and was reassigned to the Investigations Section in September of 2014.
Detective Sergeant Gilhooley is a graduate from Lewis University where he has a Bachelor's degree in Criminal Justice and a Master's degree in Public Safety Administration. He graduated from Northwestern University's School of Police Staff and Command and the Illinois Standards and Training Boards Police Executive Role in the 21st Century. He is also certified through Force Science Institute. Detective Sergeant Gilhooley has been trained as a Field Training Officer, Juvenile Officer, Evidence Technician, Bike Patrol Officer, Gang Specialist, Fitness Instructor and Defensive Tactics Instructor. He currently teaches Procedural Justice through North Eastern Multi-Regional Training (NEMRT). He is formerly a member of the DuPage Sex Crimes Task Force (SPEAR), DuPage County Anti-Gang Tactical Team (A-TAC), a supervisor for the Northern Illinois Police Alarm System Mobile Field Force (NIPAS) for four years, a class supervisor for the Suburban Law Enforcement Academy (SLEA) and the Deputy Commander for the DuPage County Major Crimes Task Force and Officer-Involved Shooting Team.
Detective Sergeant Gilhooley is currently a court certified expert in street gangs through DuPage County. He is a member of the DuPage County Incident Management Team (IMAT) and the Nothern Illinois Critical Incident Stress Management Team for first responders.
During his career with the Addison Police Department, Detective Sergeant Gilhooley has received numerous letters of commendation and awards from the Addison Merit Review Board. He also received a letter of commendation from the International Narcotics Enforcement Officers Association.