About the Office

Tim Hemstreet has served as County Administrator of Loudoun County, Virginia since December 2009. As the top administrator of one of the fastest-growing counties in the United States, Hemstreet directs and supervises the day-to-day operations of all county departments and agencies under the direct control of the elected Board of Supervisors. 

Hemstreet also serves as Clerk of the Board. The Office of the County Administrator provides administrative support to the Board of Supervisors and implements its directives with regard to Board agendas, meetings, resolutions, and constituent services.

Additionally, the county administrator serves as the Board of Supervisors' official liaison to the constitutional officers, the judiciary, and state and regional agencies. The county administrator also serves as the county's chief emergency management official.

County Administration Senior Staff

  1. Photo of Deputy County Administrator Charles Yudd

    Charles Yudd

    Deputy County Administrator

    Charles Yudd is in charge of strategic initiatives and special projects. He serves as liaison to four of the county's Constitutional Offices — the Offices of the Clerk of the Circuit Court, Commissioner of the Revenue, Commonwealth's Attorney and the Treasurer's Office —  and has responsibility for judicial functions, including those of the General District Court, the Circuit Court and the Juvenile Domestic Relations Court. He serves as liaison to Elections and Voter Registration and Library Services. He also has oversight over the county’s legislative program.


  1. Photo of Joe Kroboth

    Joe Kroboth

    Assistant County Administrator

  1. Photo of Assistant County Administrator Erin McLellan

    Erin McLellan

    Assistant County Administrator

  1. Photo of Monica Spells

    Monica Spells

    Assistant County Administrator

  1. Photo of Assistant County Administrator Valmarie Turner

    Valmarie Turner

    Assistant County Administrator

Chief of Staff

  1. Photo of David Street1

    David Street

    Chief of Staff

    David Street serves as the liaison to the Board of Supervisors’ offices, supervising the Clerks Division within the Office of the County Administrator and serving as the point of contact for the Board’s agenda management process for the Board’s business meetings, committee meetings, public hearings and special meetings. 


Division Heads

  1. Photo of Public Affairs and Communications Officer Glen Barbour

    Glen Barbour

    Public Affairs and Communications Officer
    Glen Barbour oversees the Public Affairs and Communications Division of County Administration.

  1. Photo of Emergency Management Coordinator Kevin Johnson

    Kevin Johnson

    Coordinator of Emergency Management
    Kevin Johnson oversees the Office of Emergency Management within the Office of the County Administrator.

  1. Photo of Carl Rush

    Carl Rush

    Chief Equity Officer

    Carl Rush is the Chief Equity Officer for Loudoun County. He is overseeing the development, design, coordination and implementation of programs, policies and practices aimed at making the county organization and community more equitable.