Leadership

Lieutenant Colonel Gun Lee serves as Administrative and Corrections Bureau Commander for the Loudoun County Sheriff’s Office. He began his career with the Fairfax County Police Depart (FCPD) in 1993. He served in various roles and assignments, including Patrol Officer, Sergeant, Lieutenant, and Captain. He commanded patrol stations, Major Crimes Division, and Internal Affairs Bureau as a Major. In 2018 he was promoted to the rank of Lieutenant Colonel and served as the Deputy Chief of Police for Administration. As the Deputy Chief, he was responsible for the Criminal Justice Academy and the Administrative Support, Information Technology, and Resource Management Bureaus. Lieutenant Colonel Lee is a graduate of the FBI National Academy (2015) and graduated from George Mason University with a Bachelor of Science in Business Management (2007) and a Master’s in Public Administration (2021).

Additionally, Lieutenant Colonel Lee completed advanced training in the areas of Managing Police Discipline, Special Weapons and Tactics, Instructor Development School, Advanced Hostage Negotiations, and Police involved Shootings. He also completed multiple executive leadership programs from prominent institutes. He is married and has an adult son who graduated from the Virginia Tech university.

Lieutenant Colonel Christopher Sawyer serves as Operations Bureau Commander for the LCSO.  Previously, he served as the Commander of the Criminal Investigations Division before being promoted to Lieutenant Colonel in 2022.  He began his career with the Sheriff’s Office in 2005 as a Field Deputy, Field Training Officer, and academy instructor.  He has previously served as Sergeant and 2nd Lieutenant in Patrol, 2nd Lieutenant in the Training & Accreditation Section, 1st Lieutenant in the Field Operations Division, and Captain in the Criminal Investigations Division, and Major of the Administrative and Technical Services Division.  He has attended the Professional Executive Leadership School (PELS) and the FBI-LEEDA Executive Leadership Institute and holds two master’s degrees from Liberty University.  He also graduated from the FBI National Academy in 2022. 

Major Gregory Ahlemann serves as the Commander of the Operational Support Division. He began his career with the Sheriff’s Office in 1996 as a Field Deputy. He later joined the Traffic Section of the Operational Support Division and, more recently, served as the Station Commander for both the Western Loudoun and Eastern Loudoun Stations. He graduated from the Professional Executive Leadership School (PELS) session #40 and received the FBI-LEEDA’s Leadership Trilogy Award after completing the Supervisor Leadership Institute, Command Leadership Institute, and Executive Leadership Institute programs. He also graduated from the FBI National Academy in 2020.

Major Kimberly A. Holway has served with the Loudoun County Sheriff’s Office for over 27 years.  She started her career in the Corrections Division, transferred to the Operations Bureau, and was recently re-assigned back to Corrections.  She is currently serving as Commander of Corrections.  Previous assignments include Patrol Deputy, Community Resource Deputy, Sergeant within Patrol, the Rapid Response Unit, Narcotics Unit, 2nd Lieutenant in Patrol, Assistant Commander of the Ashburn Substation, and, later, Assistant Commander of the Field Operations Division.  She was the first woman to serve on the Loudoun County SWAT team as an operator working her way up to Assistant Team Commander during her 12 years on the team.  She was the first woman firearms and rifle instructor.  She was recognized by the Northern Virginia Criminal Justice Academy for helping create a firearms course designed to assist female sworn law enforcement officers in improving their shooting skills.  Major Holway received her bachelor’s degree in Economics from Duke University and has been living in the Northern Virginia area since 1989.  She moved to Loudoun County in 1995.  She is a passionate Cross Fitter who has competed in the Reebok CrossFit Games five times, winning the Masters gold medal in 2014.

Major David Hill serves as Field Operations Division Commander for the LCSO and has focused his career on collaboration, community engagement, and data-driven, strategic crime reduction. He joined the Sheriff's Office in 2008 and has served in the Field Operations, Criminal Investigations, and Administrative and Technical Services Divisions. His notable assignments include Eastern Loudoun Station Commander; Administrative and Technical Services Assistant Division Commander; Ashburn Assistant Station Commander; Special Victims Unit Supervisor; and patrol supervisor. Additionally, he has served as a Crisis Intervention Team instructor and Search and Rescue Team member. He has participated in multiple law enforcement leadership, investigative, and tactical school programs, including graduations from the Professional Executive Leadership School (PELS) and the FBI-LEEDA Executive Leadership Institute.  He earned a master’s degree in public administration with a concentration in Virginia and local government from the George Mason University Public Service Fellows Program, a master's degree in forensic psychology from Argosy University, and a bachelor's degree in diplomacy and foreign affairs from Miami University. He and his family live in Loudoun where he is an active soccer coach, scout leader, and guitar accompanist at his synagogue.

Major Duy Nguyen serves as the Division Commander for the Court Services Division. He began his career with the Loudoun County Sheriff’s Office in 2003 as a Corrections Deputy, Training Officer, and adjunct academy instructor. He has previously served as Sergeant at the Adult Detention Center and Civil Enforcement Unit, 2nd Lieutenant in the Corrections and Court Services Division, 1st Lieutenant Corrections and Court Services Division, Civil Unrest Unit Commander, and Captain of the Corrections Division. During Major Nguyen’s employment, he has received two VALOR Awards presented by the Loudoun County Chamber of Commerce. He graduated from the Professional Executive Leadership School (PELS) session #43.

Major Craig Schleiden serves as the Commander of the Administrative and Technical Services Division. He began his career with the Sheriff’s Office in 1998 as a 911 dispatcher and transferred to a field deputy position in 2000. He worked in several capacities in the Field Operations Division as a Field Training Officer, Community Policing Officer, Sergeant, and 2nd Lieutenant. He later was named the agency’s project manager for replacing the Public Safety Technology Systems. He has served as the Assistant Division Commander for the Administrative and Technical Services Division and the Operational Support Division. He also returned to the Emergency Communications Center to serve as the Commander. He graduated from the Professional Executive Leadership School (PELS) session #50 and has attended the FBI-LEEDA Command Leadership Institute.  

Major Robert  Tricarico has served with the Loudoun County Sheriff’s Office for over 19 years and has served within the Field Operations Division, Operational Support Division, and Criminal Investigations Division. Currently, he is the Division Commander of the Criminal Investigations Division, overseeing all Major Crimes investigations, forensics, and the School Resource Officer Unit. Major Tricarico holds a bachelor’s degree from Virginia Tech.