Dr. Ronnen Levinson is a Staff Scientist and Leader of the Heat Island Group at Lawrence Berkeley National Laboratory (LBNL) in Berkeley, California, where he develops cool roof, wall, and pavement materials; improves methods for the measurement of solar reflectance; quantifies the energy and environmental benefits of cool surfaces; and promotes resilient cooling of people, buildings, cities, and the planet. He serves on the board of directors and technical committee of the Cool Roof Rating Council and advises policymakers, code officials, utilities, and building rating programs about cool surfaces. He holds a B.S. in engineering physics from Cornell University and an M.S. and a Ph.D. in mechanical engineering from the University of California at Berkeley. He has authored or co-authored over 140 publications, serves as an Associate Editor for Energy & Buildings and a Guest Editor for Nature Scientific Reports, and sits on the editorial boards of Energy & Buildings, Solar Energy Advances, and Nature Scientific Reports. He received the 2016 Marty Hastings Award for outstanding contributions to the Cool Roof Rating Council, and a 2016 R&D 100 Award for invention of the Cool Roof Time Machine.