Charles F. Gay, Ph.D., is a pioneer and global leader in solar technology with more than 50 years in the field. He earned his B.S. in Chemistry (1968) and Ph.D. in Physical Chemistry (1978) from UC Riverside. He has led world-first manufacturing milestones at ARCO Solar, Siemens Solar, ASE Americas, and Applied Materials, and served as Director of the U.S. Department of Energy’s Solar Energy Technologies Office (2016–2019) and Director of the National Renewable Energy Laboratory (1994–1997). He was elected to the U.S. National Academy of Engineering in 2013 and is an inventor on more than 15 issued U.S. patents.