Dave is responsible for overseeing the George Wright Society’s operations, including co-editing Parks Stewardship Forum and helping plan workshops and other meetings. A member of the GWS since 1985, Dave began working for the organization in 1990 and served as executive director from 1998 to 2017 before returning that role in 2019. He is active in IUCN’s World Commission on Protected Areas.  He also maintains a research interest in the relationship between biological and cultural diversity, having co-founded the NGO Terralingua, which is devoted to that subject. Dave has co-edited several volumes on protected area conservation, including The Antiquities Act: A Century of American Archaeology, Historic Preservation, and Nature Conservation (with Francis P. McManamon and Dwight T. Pitcaithley), The Full Value of Parks: From Economics to the Intangible (with Allen D. Putney), and A Thinking Person’s Guide to America’s National Parks (with Robert Manning, Rolf Diamant, and Nora Mitchell).