DEEP FISSION, INC.
Officers & Directors
Elizabeth Muller, age 47, has served as Chair of the Board of Directors (Class III), President, and Chief Executive Officer of Deep Fission since March 2024. She co-founded Deep Isolation and was its CEO from 2016 to June 2024, also holding positions as chair of its board and executive advisor. Muller holds a mathematics degree from the University of California, San Diego, and an MBA from ESCP Business School.
Richard A. Muller, age 82, has been Chief Technology Officer of Deep Fission since March 2024 and was CEO from June 2023 to March 2024. He co-founded Deep Isolation and served as its CTO from 2016 to 2023. He is Professor of Physics emeritus at UC Berkeley, holds over 80 patents, has authored more than 100 scientific articles and ten books, and has received multiple awards including the MacArthur Prize.
William (Mark) Schmitz, age 74, has been Chief Financial Officer of Deep Fission since August 2025. He has over 40 years of finance experience across various industries and previously served as CFO at Gru Energy Lab, Itron, Alghanim Industries, Goodyear, and Plug Power. Schmitz holds undergraduate and MBA degrees from The Ohio State University.
Michael Brasel, age 50, has been Chief Operating Officer of Deep Fission since October 2025. He was Vice President of Nuclear Programs from December 2024 to October 2025. Prior to joining Deep Fission, Brasel held senior operations and supply-chain roles at NuScale Power Corporation.
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