Phi Beta Kappa; Omicron Delta Kappa; Phi Kappa Phi. Member, Michigan Law Review, 1972-1973. Lecturer: Marshall-Wythe School of Law, 1981-1990, 2007-2009. Chair, Administrative Law Section, Virginia Bar Association, 1991-1992. Chair, Water Rights Subcommittee, Water Resources Division, American Water Works Association, 1998-2001; Chair, Old Dominion Chapter of Air and Waste Management Association, 1999-2000; Member, 1998-2011 and Chair, 2002, Virginia State Advisory Board on Air Pollution.