Mark Ruth is the Manager of the Industrial Systems and Fuels Group in the Strategic Energy Analysis Center at the National Renewable Energy Laboratory (NREL) in Golden, Colorado, USA. In that role, Mark leads a group of analysts investigating opportunities to improve energy use in the industrial and transportation sectors. Mark is also leading multiple hydrogen analysis efforts including a multi-laboratory project that estimated the technical and economic potential of the H2@Scale concept, an effort to inform a New York state hydrogen strategy, and analyses of electrolyzer cost and performance including benefits of using them as controllable loads. In addition, Mark is leading analyses of the economic potential to convert existing nuclear power plants to flex between electricity and hydrogen production. Previously, he led several analyses of the optimal configurations and operation of greenfield, tightly-coupled nuclear-renewable hybrid energy systems. Over Mark’s 28 years at NREL, he has an extensive history of developing methods to value opportunities in the energy sector as well as technical analyses of hydrogen and bioenergy systems. Mark has a BS in Chemical Engineering from the University of Colorado.