Steve is the project lead of MethaneSAT and, in a separate capacity, Chief Scientist at Environmental Defense Fund, where he initiated and oversaw an unprecedented initiative involving over 150 scientists from more than 40 institutions measuring methane leakage across the U.S. natural gas supply chain. Steven serves as Chief Scientific Officer for the United Nations Environment Programme’s Global methane studies, a joint effort of UNEP, EDF, DG Energy (European Commission) and the Oil and Gas Climate Initiative companies. He was previously on the faculty of Brown University for 16 years. He has published more than 100 scientific papers and served as a lead author for the Intergovernmental Panel on Climate Change.