Harford County Sheriff's Office

With courage, honor, and integrity, we protect the rights of all citizens


Bureau Chiefs

Major William Davis Police Operations Bureau

Major William Davis - Police Operations Bureau

William Davis most recently served as the Assistant Director of Public Safety for the Community College of Baltimore County. Prior to his appointment with the Community College of Baltimore County, he served as a Major in the Baltimore Police Department and Commanding Officer for the Southeastern District. In this position, Major Davis oversaw the daily police operations of more than 200 officers, sergeants, lieutenants and civilian personnel. His responsibilities included the development and deployment of crime prevention and response strategies as well as cultivating and sustaining solid partnerships with community and business leaders within the City of Baltimore.

Over the course of 25 years with the Baltimore Police Department, Major Davis worked in a variety of roles, progressing from patrol assignments to criminal investigative positions. These include working on federal task forces and as the commanding officer of district detectives and operations units.

Major Davis holds a Master of Science in Management from The Johns Hopkins University and currently serves adjunct faculty in The Johns Hopkins University's Division of Public Safety Leadership. Major Davis is also a recent graduate of the Police Executive Research Forum's (PERF) Senior Management Institute for Police.

Major John (Jack) Simpson Administrative Services Bureau

Major John (Jack) Simpson - Administrative Services Bureau

Jack Simpson retired as a Major from the Maryland State Police serving for 28 years. As a command officer, he led the Criminal Investigation Division, the Special Operations Command, a Barrack, a Troop consisting of multiple Barracks and two Regions consisting of all Field Operations installations, which included tactical, patrol, investigations and Community Policing components. Major Simpson was the Assistant Chief for the Support Services Bureau which included Licensing and Regulatory components.

Major Simpson has a B.S. in Criminal Justice from the University of Maryland University College and a M.S. in Management from Johns Hopkins University, graduating from their Police Executive Leadership Program. Prior to this appointment, Major Simpson served as the Executive Director of the Maryland Vehicle Theft Prevention Council and an Adjunct Professor of Criminal Justice for the University of Maryland University College.

Major Michael Gullion Correctional Service Bureau

Major Michael Gullion - Correctional Service Bureau

Michael Gullion currently serves as the Support Services Commander at the Harford County Detention Center. During the course of his 22 year career, he has served as Commander of two divisions within Corrections. As Operations Commander, he was responsible for 116 staff to include Security Operations, Gang Intel Unit, Correctional Response Team and K9 Unit. As Inter Agency Processing Commander, he supervised 45 staff members who were responsible for the processing, booking, release and transportation of all inmates who are processed through the Harford County Detention Center. As Training Coordinator, he developed and coordinated the first Correctional Entrance Level Academy to proactively address the multitude of issues that face the Correctional staff on a daily basis.

In addressing the need of inmates with mental illness, Major Gullion is a Crisis Intervention Team member and is currently serving as the security liaison for the Behavioral Health Unit in order to provide for a safer correctional environment for all. He has also served on numerous community organization advisory boards, which provides the community a proactive understanding of corrections in Harford County and provides a community corrections approach to the Harford County Detention Center. Major Gullion has completed both the Harford Leadership Academy and the Maryland Police and Correctional Training Center Leadership Challenge, and served as a mentor to other sessions.