Signed by GMU president Alan Merton. This certificate represents 25 years of service IN THE COMMONWEALTH OF VIRGINIA, not at George Mason exclusively. Warfield was at George Mason University for 16 years, from 1984 until his retirement on 1 September 2000. Prior to that time, he was employed by the Commonwealth at University of Virginia, Charlottesville, beginning as chairman of Electrical Engineering Department 1 January 1975, and later working as director of Center for Interactive Management at University of Virginia.