Dr. Cohn is a research scientist at the MIT Energy Initiative where his research includes alternative transportation fuels, high efficiency engines and natural gas to liquids conversion technology. He was Executive Director of the MIT Study on the Future of Natural Gas. Prior to joining the Energy Initiative , he held a joint appointment as a senior research scientist at the MIT Plasma Science and Fusion Center and the Nuclear Science and Engineering Department, from which he retired in 2011. Dr. Cohn received an AB from the University of California at Berkeley and a PhD in physics from MIT. After joining the MIT research staff in 1971 he held various positions that included leader of the laser and plasma group at the National Magnet Laboratory and head of the plasma technology division at the Plasma Science and Fusion Center. His research included laser diagnostics of plasmas, nuclear fusion reactor concepts , plasma treatment of waste and vehicular applications of plasma technology. Dr. Cohn is a co-founder of InEnTec, a company that provides electrically enhanced gasification technology for converting hazardous, medical and municipal waste to clean fuel. He is also a co-founder and CEO of Ethanol Boosting Systems (EBS), whose technology provides on-demand octane boosting of gasoline engines, enabling higher efficiency and performance. He is an inventor of 50 US patents. Dr. Cohn is a fellow of the American Physical Society. He was a recipient of the Discover Award for Innovation in Transportation and three R&D 100 Awards for technological innovation in environmental technologies.