Delegate, Commonwealth of Virginia House of Delegates, District 48, 1998-2014

Former Member, Appropriations Committee, Commonwealth of Virginia House of Delegates

Member, Arlington County Local Emergency Planning Committee, present

Former Member, Education Committee, Commonwealth of Virginia House of Delegates

Former Member, Privileges and Elections Committee, Commonwealth of Virginia House of Delegates

Former Member, Subcommittee #3 (Transportation), Commonwealth of Virginia House of Delegates

Former Member, Subcommittee on Health and Human Resources, Commonwealth of Virginia House of Delegates

Former Member, Transportation Committee, Commonwealth of Virginia House of Delegates

Member, Arlington County Transportation Commission, 1996-1997

Deputy Commissioner for Aging, Virginia Department of Aging and Rehabilitative Services, 2014-present

Legislative Consultant, 1997-present

Employee, AHC, Incorporated

Member, Alternative Analysis Policy Advisory Committee

Deputy Assistant Attorney General, United States Department of Justice, 1993-1997

Deputy General Counsel, Judiciary Committee, United States House of Representatives, 1989-1993

Counsel, Government Operations Committee, United States House of Representatives, 1978-1989

Member, Arlington County Fiscal Affairs Advisory Committee, 1983-1985

United States Army, 1969-1971

Member, Arlingtonians for a Better County, 1981-present

Member, Arc of Virginia, present

Member, Arlington Chamber of Commerce, present

Member, Arlington Historical Society, present

Member, Board of Directors, Virginia Foundation for the Humanities

Member, Board of Directors, Warren Stambaugh Foundation

Member, Community Advisory Council, Arlington Learning in Retirement Institute, present

Board Member, Federation of State Humanities Councils 2010–present

Board Member, Northern Virginia Regional Health Information Organization (NOVA RHIO), present

Member, Virginia Historical Society

Chair/Board Member, Virginia Young Men's Christian Association (YMCA)

Member, Voices for Virginia's Children

Member, Voices for Virginia’s Children, present

Board Member, Warren Stambaugh Foundation, present

Chair, Model General Assembly, Virginia Young Men's Christian Association (YMCA), 2009-2010

Member, Virginia Foundation for the Humanities, 2003-2010

Chair, Virginia Foundation for the Humanities, 2009-2010

General Coordinator, Arlington School Bonds Campaigns, 1996

Member, Advisory Board, Northern Virginia Hotline, 1985-1993

Member, Executive Committee, Arlingtonians for a Better County, 1984-1989

Manager, Arlington School Bonds Campaigns, 1988

Volunteer Listener, Northern Virginia Hotline, 1972-1975