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 Elections and Voter Registration and Library Services as well as the Treasurer’s Office and the Office of the Commissioner of the Revenue. He also has purview over Public Affairs and Communications as well as the county’s legislative program.

  1. Photo of Assistant County Administrator Erin McLellan

    Erin McLellan

    Assistant County Administrator
    Erin McLellan oversees the Departments of Parks, Recreation and Community Services, General Services, Information Technology and the Office of Mapping and Geographic Information. 




  1. Photo of Assistant County Administrator John Sandy

    John Sandy

    Assistant County Administrator
    John Sandy oversees the Departments of Fire & Rescue, Community Corrections, Animal Services and the Office of Emergency Management. He also serves as the liaison to the Sheriff's Office, Clerk of the Circuit Court, Commonwealth's Attorney and Circuit & District Courts. 

  1. Photo of Assistant County Administrator Monica Spells

    Monica Spells

    Assistant County Administrator
    Monica Spells oversees human services agencies, including the Departments of Family Services and Mental Health, Substance Abuse and Developmental Services. She serves as the liaison to the Health Department, Juvenile Court Service Unit and Juvenile and Domestic Relations Court and the Virginia Cooperative Extension - Loudoun Office.

  1. Photo of Assistant County Administrator Valmarie Turner

    Valmarie Turner

    Assistant County Administrator
    Valmarie Turner oversees the community development agencies, including the Departments of Building and Development, Planning and Zoning, Economic Development and the Office of Housing.

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. Sarah Etro

    Sarah Coyle Etro

    Project Manager,Unmet Housing Needs Strategic Plan
    Sarah Coyle Etro oversees the Office of Housing 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. Dorri O'Brien

    Dorri O'Brien

    Chief of Staff
    Dorri O'Brien oversees the operations of the Office of the County Administrator, which includes administrative support to the Board of Supervisors and Board meetings, records management, the Board meeting packet process, and Freedom of Information Act requests. O'Brien and her staff also serve as liaisons to the Board's Finance, Government Operations and Economic Development Committee; and Transportation and Land Use Committee.