Senior Staff Attorney for the Natural Resources Defense Council (1977-1979), Chief of the Hazardous Waste Section and Special Litigator for Hazardous Waste in the Lands and Natural Resources Division of the U.S. Department of Justice (1979-1982), and Executive Director of Trial Lawyers for Public Justice (1982-1987). He has been an Adjunct Professor and Research Fellow in Environmental Studies at Dartmouth College and lectures frequently with the American Law Institute and others on expert witness admissibility and environmental law. Currently Chair of the Vermont Public Utilities Commission.