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Sheriff's Office

Posted on: June 6, 2023

Sheriff Mike Chapman Announces Strategic Realignment of Loudoun County Sheriff’s Office

media release website

Loudoun County, VA (June 6, 2023) – Loudoun County Sheriff Mike Chapman has announced a strategic realignment of the organization and his executive leadership team, effective July 6, 2023.  The realignment expands the Loudoun County Sheriff’s Office (LCSO) from two to three distinct bureaus: the Field Operations Bureau, Investigations Bureau, and Administrative and Corrections Bureau.  In addition, a third Lieutenant Colonel will be named instead of an Under Sheriff, a position that has been vacant since the departure of Colonel Mark Poland last fall.

“This realignment places the LCSO in a stronger position to serve Loudoun County now and in the future,” said Chapman, who was first elected in 2011. “It will be accomplished within LCSO’s approved budget, with no additional costs to taxpayers,” he added. Chapman expects to announce additional initiatives after the realignment is in place.

The new structure is consistent with recommendations made by the International Association of Chiefs of Police (IACP) in its report to the Loudoun County Board of Supervisors (BOS) last year and will better position the agency to decentralize and strengthen its patrol operations. The management and operational changes will also enhance community policing, especially from LCSO’s four regional stations – Ashburn, Dulles South, Eastern Loudoun, and Western Loudoun. Last month, the BOS approved 40 new deputy positions for FY24: with 36 of them assigned to patrol, along with one new School Resource Officer (SRO), and three co-responder deputies. 

“As a significant component of this realignment, I am proud to announce that Robert “Bob” Mosier has agreed to join the LCSO command staff,” Chapman said. “Bob is a highly respected professional with outstanding leadership skills and a lifelong commitment to public service. He will be an immediate asset to Loudoun County and the LCSO, complementing the forward-looking leadership of Lt. Colonel Christopher Sawyer and Lt. Colonel Gun Lee,” he added. 

The LCSO’s executive leadership team will be as follows: Sheriff Mike Chapman; Lieutenant Colonel Christopher Sawyer, Chief Deputy, Field Operations Bureau; Lieutenant Colonel Gun Lee, Chief Deputy, Investigations Bureau; and Lieutenant Colonel Robert Mosier, Chief Deputy, Administrative and Corrections Bureau.

Lt. Colonel Sawyer joined the LCSO in 2005, and currently serves as Chief Deputy, Operations Bureau, the area that is being most significantly realigned. He previously served as Major of the Criminal Investigations Division, Major of the Administrative and Technical Services Division, Captain of the Criminal Investigations Division, and 1st Lieutenant of the Field Operations Division. Sawyer is a graduate of the FBI National Academy, attended the Professional Executive Leadership School (PELS) and FBI-LEEDA Executive Leadership Institute, and earned a Master of Business Administration and a Master of Science in Criminal Justice and Public Administration from Liberty University.

Lt. Colonel Lee joined the LCSO last year after 29 years of service with the Fairfax County Police Department (FCPD), and currently serves as Chief Deputy, Administrative and Corrections Bureau. During his tenure with FCPD, he commanded patrol, major crimes, and internal affairs, and spent his last four years as Lt. Colonel and Deputy Chief of Police for Administration. In that capacity, Lee was responsible for the Criminal Justice Academy and the Administrative Support, Information Technology, and Resource Management bureaus. He is a graduate of the FBI National Academy, and earned a Bachelor of Science in Business Management, and a Master of Science in Public Administration from George Mason University.

Bob Mosier will join the LCSO with over 30 years of experience in federal, state, and local law enforcement, most recently as Secretary of Public Safety and Homeland Security for Governor Glenn Youngkin, who also appointed him to serve on the Virginia Substance Abuse Services Council and Criminal Justice Services Board.  He also distinguished himself working for the U.S. Department of State and U.S. Department of Defense in support of international policing, management, and training efforts, and for the International Justice Mission, a human rights organization.  Mosier was elected twice as Sheriff of Fauquier County, and previously served as Commander of Special Operations, the Patrol Division, and the Criminal Investigations Division. 

The LCSO is the largest full-service Sheriff’s Office in the Commonwealth of Virginia and employs approximately 650 sworn and 200 civilian personnel, managing law enforcement, court services, and corrections.

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