Kristen C. Umstattd was elected to represent the Leesburg District on the Loudoun County Board of Supervisors in November 2015. She serves on the Board's Transportation and Land Use Committee. She is also one of the Board's representatives on the Transportation Committee of the Virginia Association of Counties, as well as the Annexation Area Development Policy Committee, the Family Services Board, and the Potomac Watershed Roundtable.

Previously, Kristen served as Mayor of the Town of Leesburg from 2002 to 2016 and was a member of the Leesburg Town Council from 1992 to 2002. She served for many years as the Leesburg Town Council's liaison to the Leesburg Planning Commission.  

In addition, Kristen has served on the boards of the following statewide and regional organizations: Past President, Virginia Association of Planning District Commissions; Past Chair, Northern Virginia Regional Commission; Towns' representative on the Northern Virginia Transportation Authority; Northern Virginia Transportation Coordinating Council; Dulles Area Transportation Association; Past Chair, Towns' Association of Northern Virginia; Coalition of Loudoun Towns Advisory Committee; Loudoun Hospital Executive Council; Board member, Journey Through Hallowed Ground; and Past Commander, American Legion Post 34. 

Kristen is a native of Philadelphia, Pennsylvania. She graduated magna cum laude and Phi Beta Kappa from Yale University with a B.A. in Russian and East European Studies. She holds a J.D. from Yale Law School and a Certificate in Chinese Studies from Cheng-chi University in Taiwan. Kristen moved to Virginia in 1981, while on active duty as a Lieutenant in the U.S. Naval Reserve.  After her honorable discharge from active duty, she continued with the U.S. Naval Reserve, translating Soviet naval documents from Russian into English for the U.S. intelligence community. She then joined the Central Intelligence Agency as a Soviet Naval analyst. She and her husband, Charles K. Moss, moved to Leesburg in 1987 and have been practicing law together ever since.  Their daughter, Kendrick, a graduate of the Loudoun County Public Schools, is a student majoring in Electrical Engineering and Computer Science at Yale University.