He is director of the Collaborative Program on Ethical Dimensions of Climate Change in the Rock Ethics Institute. Dr. Brown served as senior counsel for Sustainable Development for the Pennsylvania Department of Environmental Protection. During the Clinton Administration, he was program manager for United Nations organizations at the United States Environmental Protection Agency (USEPA) Office of International Environmental Policy, where he served as the lead on sustainability. Currently, Dr. Brown is director of the Pennsylvania Environmental Resource Consortium, an organization of fifty-six Pennsylvania universities that advocates sustainability on campuses.