General Counsel, National Labor Relations Board, 2006-2010
Special Assistant, Office of the General Counsel, National Labor Relations Board, 2005
Member, National Labor Relations Board, 2004
Office of the Solicitor, U.S. Department of Labor, Division of Mine Safety and Health, 1978-80
Office of the Solicitor, U.S. Department of Labor, Division of Employee Benefits, 1974-78