Dr. Cohen joined Atmospheric and Environmental Research in 1998. Prior to AER, he spent two years as a National Research Council Fellow at the NASA Goddard Institute for Space Studies after two years as a research scientist at MIT’s Parsons Laboratory. Cohen received his Ph.D. in Atmospheric Sciences from Columbia University in 1994 and has since focused on conducting numerical experiments with global climate models and advanced statistical techniques to better understand climate variability and to improve climate prediction. Cohen develops AER’s long range forecast products for commercial clients who include some of the largest investment firms in the US. He's been interviewed on television, the Wall Street Journal, Boston Globe, and Investor’s Business Daily, among others. His work is highlighted by the National Science Foundation (NSF).

Dr. Cohen has a Research Affiliate appointment in the Civil Engineering Department at Massachusetts Institute of Technology (MIT) and is a member of the American Meteorological Society (AMS) and the American Geophysical Union (AGU). He has published over two dozen articles on seasonal forecasting in their journals and others. Most recently, Dr. Cohen was appointed Associate Editor of the Journal of Climate, a peer-reviewed publication of the AMS.