Mark Ruth is the Group Manager of the Industrial Systems and Fuels Group in the Strategic Energy Analysis Center at the National Renewable Energy Laboratory (NREL) in Golden, CO (Email: mark.ruth@nrel.gov). In that role, he is leading the multi-laboratory effort to analyze the potential of H2@Scale — a concept where hydrogen is an energy intermediate that complements electricity. He has also led an effort to analyze optimal configurations and operation of tightly coupled nuclear-renewable hybrid energy systems and is leading other analyses that are focused on identifying potential synergies between nuclear and renewable energy sources. Over his 25 years at NREL, he has had an extensive history of developing methods to value opportunities in the energy sector, as well as technical analyses of hydrogen and bioenergy systems. He received his BS in chemical engineering from the Univ. of Colorado.