President World Society for Protection of Animals, London, 1986-1990, vice president, 1990-1998. Director Center Respect Life and Environment, Washington, 1986-1997. Director International Center Earth Concerns, California, since 1994.
Member Earth Charter Commission. Vice president International Development Conference, Washington, 1997-1999, 01-03. Director Bear Castle Property Owners Association, Bumpbass, Virginia, 2001-2007.
Honorary vice president Institute for Animals and Society, Baltimore, 2004-2005.