Founders

 CFS Co-Founders (left-to-right): Martin Greenwald, Dan Brunner, Zach Hartwig, Brandon Sorbom, Bob Mumgaard, and Dennis Whyte. Photo credit  Bryce Vickmark .

CFS Co-Founders (left-to-right): Martin Greenwald, Dan Brunner, Zach Hartwig, Brandon Sorbom, Bob Mumgaard, and Dennis Whyte. Photo credit Bryce Vickmark.

Commonwealth Fusion Systems was founded in 2017 to combine the lean, fast mentality of a startup with the deep talent pool of academia and the world's leading investors in science and energy to develop the fastest path to commercial fusion energy.

The six co-founders* hail from the MIT Plasma Science and Fusion Center (PSFC), the world leader in high-field fusion:

Martin Greenwald
Dan Brunner
Zach Hartwig
Brandon Sorbom
Robert Mumgaard
Dennis Whyte

CFS is collaborating with researchers at the MIT Plasma Science and Fusion Center to design and build a new class of superconducting magnets that will drastically reduce the size and cost of fusion power plants.

*in accordance with MIT's conflict-of-interest policy, MIT-employed co-founders have no financial interest in CFS

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CFS Team

BOB MUMGAARD, PH.D. /
CHIEF EXECUTIVE OFFICER
CFS CO-FOUNDER

Bob drives the company’s vision to accelerate the path to commercial fusion energy by managing its strategic partnerships and technical approach. He believes in the power of technical and organizational innovation to facilitate the breakthroughs needed to combat climate change. Prior to CFS Bob was a DOE fellow and a MIT Translational Fellow — he studied the history, organization, and execution of large-scale projects in science and technology and focused on how entrepreneurship, risk-retirement strategies, and partnerships could speed fusion from the laboratory to the market. His PhD work focused on the high-field approach to fusion.

DAN BRUNNER, PH.D. /
CHIEF TECHNOLOGY OFFICER
CFS CO-FOUNDER

Dan ensures the company’s technical work serves its business strategy and fusion energy mission. Prior to CFS, Dan was a Research Scientist at MIT working to develop power exhaust solutions in compact fusion devices. 

BRANDON SORBOM, PH.D. /
CHIEF SCIENCE OFFICER
CFS CO-FOUNDER

Brandon develops scientific collaborations between CFS, academia, and industry, as well as developing CFS’s strategy to procure high-temperature superconductor (HTS). Prior to CFS, Brandon was a Postdoctoral Associate at MIT working on techno-economic fusion device design as well as the characterization of HTS wire.

STEVE RENTER /
CHIEF OPERATING OFFICER

Steve directs the company’s business operations, financing, external relations, and day-to-day affairs. Prior to CFS, Steve was a first-hire at the solid-state battery startup Ionic Materials, where he helped build the team and company strategy, raise Series A, B, and C rounds of financing, and execute partnerships for commercialization.

Collaborators

DENNIS WHYTE, PH.D. /
HITACHI AMERICA PROFESSOR OF ENGINEERING, MIT
HEAD, MIT DEPARTMENT OF NUCLEAR SCIENCE & ENGINEERING
DIRECTOR, MIT PLASMA SCIENCE & FUSION CENTER
CFS CO-FOUNDER

MARTIN GREENWALD, PH.D. /
SENIOR RESEARCH SCIENTIST, MIT
DEPUTY DIRECTOR, MIT PLASMA SCIENCE & FUSION CENTER
CFS CO-FOUNDER

ZACH HARTWIG, PH.D. /
JOHN CLARK HARDWICK (1986) ASSISTANT PROFESSOR, MIT DEPARTMENT OF NUCLEAR SCIENCE AND ENGINEERING
AND PLASMA SCIENCE AND FUSION CENTER
CFS CO-FOUNDER

ANNE WHITE, PH.D. /
CECIL & IDA GREEN ASSOCIATE PROFESSOR, MIT DEPARTMENT OF NUCLEAR SCIENCE & ENGINEERING
ASSISTANT HEAD, MAGNETIC FUSION EXPERIMENTS DIVISION, COLLABORATION SUB-DIVISION, MIT PLASMA SCIENCE & FUSION CENTER

EARL MARMAR, PH.D. /
SENIOR RESEARCH SCIENTIST, MIT DEPARTMENT OF PHYSICS
HEAD, MAGNETIC FUSION EXPERIMENTS DIVISION, MIT PLASMA SCIENCE & FUSION CENTER

JOSEPH MINERVINI, PH.D. /
SENIOR RESEARCH ENGINEER, MIT DEPARTMENT OF NUCLEAR SCIENCE AND ENGINEERING
ASSISTANT DIRECTOR, MIT PLASMA SCIENCE & FUSION CENTER
DIVISION HEAD, MAGNETS & CRYOGENICS, MIT PLASMA SCIENCE & FUSION CENTER

JAMES IRBY, PH.D. 
PRINCIPAL RESEARCH ENGINEER, MIT
CHIEF ENGINEER, MAGNETIC FUSION EXPERIMENTS DIVISION, MIT PLASMA SCIENCE & FUSION CENTER