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 Sergeant in November of 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 August of 2012, he became the Administrative Sergeant for the Support Services Division, where he was responsible for the Crime Prevention Unit, the Property and Evidence Unit, the Special Projects Unit, the Henry Hyde Resource Center, the Indian Trail Student Participation Center and the Photo Enforcement Safety Program. When Detective Sergeant Gilhooley's tour as Administrative Sergeant was completed, he returned to the Field Services Division where he was responsible for the afternoon shift. On September 2, 2014, Detective Sergeant Gilhooley was reassigned to the Investigations Section.
Detective Sergeant Gilhooley is a graduate from Lewis University where he received a Bachelor's degree in Criminal Justice. In 2014, he graduated from Northwestern University's School of Police Staff and Command. In 2015, he attended the Force Science Institute and received a certification. He has been trained as a Field Training Officer, Juvenile Officer, Evidence Technician, Bike Patrol Officer, Gang Specialist, Fitness Instructor and Defensive Tactics Instructor. He was a member of the DuPage Sex Crimes Task Force (SPEAR) and the Midwest Gang Investigators Association and was a supervisor for the Northern Illinois Police Alarm System Mobile Field Force (NIPAS) for four years. He is currently a court certified expert in street gangs and a member of the Midwest Homicide Investigators Association.
Detective Sergeant Gilhooley is Supervisor for the DuPage County Major Crimes Task force and a member of the Incident Management Assistance Teams (IMAT) in DuPage County. He is also a member of the Critical Incident Stress Management Team for Police Officers
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.