Lieutenant Gregory Gilleece holds a B.A. from Sacred Heart University and an M.A. from Seton Hall University. He began his law enforcement career with the Township of Union Police Department before joining the Port Authority of New York and New Jersey Police Department.

A graduate of the prestigious NYPD STS School. Lieutenant Gilleece has served in a wide range of assignments, including Newark Airport, PATH, LaGuardia Airport, the George Washington Bridge, Emergency Services Unit (ESU), and the Counterterrorism Unit (CTU). His diverse experience across critical infrastructure and specialized units reflects his commitment to public safety and operational excellence.

Currently, Lieutenant Gilleece serves on the Executive Board of the Lieutenants Benevolent Association (LBA), where he continues to advocate for the welfare and professionalism of his fellow Lieutenants.