top of page

Who we are

ZettaJoule

mitsuo 0.png

Mitsuo
Shimofuji

Co-founder, President & CEO

mitsuo 1_edited.jpg

17 years of experience in mega project of natural resources,  Biz-Dev, M&A, Finance, Governance, etc.

Jeff 00.png

Jeff
Harper, MBA

Co-Founder

EVP

Chief Commercial Officer

jeff 01_edited.jpg

30 years in nuclear sector. 

ex-X-energy VP, ex-Westinghouse, etc.

kaz 00.png

Dr.Kazuhiko
Kunitomi

Co-Founder, CNO

kk01 kari_edited.jpg

Internationally known expert in HTGR. 

ex-JAEA Deputy Director General, Sector of Fast Reactor and Advanced Reactor R&D

rumina 00.png

Rumina
Velshi

Co-Founder

Regulatory Affairs

rumina 01_edited.jpg

4 decades of experience in nuclear space. ex-President & CEO, Canadian Nuclear Safety Commission. 

ex-Ontario Power Generation.

finis 00.png

Dr.Finis
Southworth

CTO

finis 00.png

Former Areva CTO

Former Leader of NGNP

Ex. Project Management of INL

john 01_edited.jpg

John
Valentino

VP

International Government Affairs

john 01_edited.jpg

ex-E-energy (BD, Gov’t affairs), 

ex-Centrus, ex-Westinghouse, 

ex-Duke Energy, ex-IAC

mike 00.png

Mike
Melton

VP

Business Development

International Regulatory Affairs

mike 01_edited.jpg

Current X-energy (BD, Licensing), 

ex-NuScale Licensing Manager, 

ex-Westinghouse, MHI

ken 01.png

Ken
Petrunik

Senior Advisor to the CEO

ken 01_edited.jpg

Advisor to CEO, ENEC

Chair Advisory Board Rolls-Royce SMR

Ex. ENEC Chief Program Officer

Ex. Candu Senior VP Projects

asahi 00.png

Asahi
Chikaoka

Co-Founder

asahi 00.png

Nuclear researcher in quantum beam, beta decay research. 

Intern at Toshiba and JAEA.

Kaoko 00.png

Kaoko
Tateishi, CPA

VP

Corporate & Finance Ops

Kaoko 00.png

Professional of international tax, FP&A, Accounting
ex-Sumitomo Corporation

ex-Deloitte

jun 00.png

Junichi
Sadamori, CPA

VP

Compliance & Administration

junichi 01_edited_edited.jpg

Professional of Internal Control
ex-Sumitomo Corporation

ex-PwC

rube 00.png

Dr.Rube
Williams

Rep in Texas

rube01_edited.jpg

Nuclear Engineer, IT/AI Professional

Ex. NASA Ex. JAXA …etc

bottom of page