Bill Tumas is the Associate Laboratory Director of Materials and Chemical Science and Technology (MCST) responsible for overall leadership, management, technical direction, and workforce development of the materials and chemical science and technology capabilities at NREL that span fundamental and applied R&D for renewable energy and energy efficiency. Key program areas include solar energy conversion for electricity and fuels, materials discovery and development for renewable energy technologies, hydrogen production and storage, and fuel cells. He is also the Director of the Center for Next Generation of Materials by Design Energy Frontier Research Center and serves as the NREL laboratory point of contact for Office of Science, Basic Energy Sciences. Prior to NREL, Bill was at Los Alamos National Laboratory where his last position was Program Director for Applied Energy Programs. He was a founding board member of Green Chemistry that is now part of the American Chemical Society. He started his career at DuPont Central Research. His research activities have included materials by design, solar energy conversion, chemical hydrogen storage, homogeneous and phase-separable catalysis, supercritical fluids, green chemistry, and waste/wastewater treatment technology development/assessment. He has over 50 peer-reviewed publications, 12 patents, and has given over 125 invited presentations and seminars. Bill received a BA in Chemistry from Ithaca College and a PhD from Stanford then did postdoctoral research at Caltech.