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Marathon Fusion




San Francisco, CA



Adrien Benusiglio

Scientist, Marathon Fusion

Adrien Benusiglio joins Breakthrough Energy’s Innovator Fellows program from Marathon Fusion in San Francisco, California. Adrien has close to 10 years of experience in energy and efficiency R&D, having led ARPA-E and Department of Energy awards at Otherlab. At Marathon Fusion he oversees testing and development.

Marathon Fusion is taking the critical next step to commercialize a fuel processing component essential for fusion power plants. Compared to conventional technologies, Marathon’s approach enables a dramatic reduction in tritium inventory fuel processing cost while easing engineering requirements on other critical systems. This solution is simple, robust and highly scalable to meet the challenges of commercial fusion.

Adrien is an enthusiastic cyclist and spends most of his free time in nature. He has a Master of Science in mechanics and material engineering and a Doctor of Philosophy in fluid dynamics form École Polytechnique in France.


What’s the best piece of advice you’ve been given?
Stop being worried.

Who has had the greatest impact on your career path?
My physics teachers in high school

What beliefs drive you?
I am worried that the climate crisis is going to be far worse than most realize. I guess I should use the best piece of advice I have been given more!