John Lassek serves as the Deputy Assistant Secretary for Subsurface Energy at the U.S. Department of Energy, overseeing research and development across oil and gas, coal, and geothermal sectors. Their work focuses on advancing subsurface energy systems through technical direction and collaboration with various stakeholders, including government and industry. Previously, John held senior positions at Ovintiv and Newfield Exploration, specializing in completions optimization and technology deployment in multiple basins. They also have experience as Managing Director of Production Enhancement at CARBO and Engineering Manager at Schlumberger, where they led large teams and drove technical innovations. John is currently pursuing a Bachelor of Science in Petroleum Engineering at the University of Alaska Fairbanks.
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