Shaping the Future of Nuclear Together
We’re an international team of globally-recognized experts and leaders, combining decades of experience to bring proven advanced SMR technology to market.
"Amid the global shift toward decarbonization, ensuring a stable energy supply that can reliably meet demand is vital for the sustainable growth of all economic and social activities."
Mitsuo Shimofuji
Co-Founder, President and CEO,
Board of Directors
Board of Directors
Leadership Team
Mitsuo Shimofuji
Co-Founder, President and CEO, Board of Directors
Jeffrey Harper
Co-Founder, Chief Commercial Officer, ZROC President
Rumina Velshi
Co-Founder, Principal, Strategic Advisor to the CEO
Kazuhiko Kunitomi, Ph.D.
Co-Founder, ZettaJoule KK Chief Nuclear Officer
Finis Southworth, Ph.D.
Chief Technology Officer
Kian Granmayeh
Chief Financial Officer
Yasushi Fukuizumi
ZettaJoule KK Deputy CEO
Kym Harshaw
Executive Vice President of Regulatory Affairs, General Counsel
Tetsuaki Takeda, Ph.D.
ZettaJoule KK Deputy Chief Nuclear Officer
Ken Petrunik, Ph.D.
Advisor to the CEO
Rube Williams, Ph.D.
Vice President of AI and Digital Operations
Aldo Capristo
Senior Vice President of Corporate Service and Safety
Sherry Williams
Director of Communications
Ryan Sprengel
Vice President of Licensing
Peter Tran
Director of Program Management & Supply Chain
Yoshiaki Ichinowatari
ZettaJoule KK Vice President of Strategic Government Engagement
Hidetaka Okui, Ph.D.
ZettaJoule KK Assistant to Chief Nuclear Officer
Thomas Drury
Director of Core Design
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Yukiko Ueda
Chief of Staff to Chief Commercial Officer
J. Ricardo Castillo
Vice President of Business Development
Asahi Chikaoka
Co-Founder, ZettaJoule KK Engineer
Andrea Veil
Senior Vice President of Regulatory Strategy
Karson Volkmer
Senior Counsel
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Fumitaka Osumi
Vice President of Corporate Development
Abdul S. Usmani
IT Manager
Kohki Kuwahara
ZettaJoule KK Senior Engineering Director and Project Manager
Shikha Kumar
Safety and Shielding Analysis Engineer
Learn More About Us
Discover what sets us apart, the value of partnering with us, and opportunities to join our dynamic, multi-national team.
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