We are a small team of physicists and engineers. The work is early, the questions are real, and the standard is high. Our findings feed into research in fusion energy, scientific discovery, advanced simulation, AI for Physics and quantum technologies.
Some problems are too important not to solve.
Your mission
Lead the nuclear theory behind a new approach to fusion energy.
At Snap Fusion, we are pursuing a bold mission: developing a fundamentally new approach to controlled fusion energy.
Parts of our roadmap rest on questions of low-energy nuclear physics. Some of these have clear answers in the literature; others turn out, on close reading, to be less settled than they first appear. Knowing which is which matters to us, because it shapes what we build and what we test.
We are therefore establishing an in-house nuclear theory effort, and we are looking for a senior few-body theorist to lead it. Your job will be to decide which of our questions current theory can actually answer, to answer those at a standard that would hold up to expert review, and to say plainly where the uncertainties lie.
This is an unusual setting for a theorist, in a good way: the questions are concrete, the team is small, and your conclusions will be acted on.
What you will do
You will work directly with the founders as theory lead. Your responsibilities may include:
Leading theory projects from problem definition to a clear recommendation
Judging which questions current nuclear theory can answer, and with what uncertainty
Carrying out and supervising few-body scattering and reaction calculations
Setting the benchmarks and cross-checks against which results are accepted
Working with our computational physics lead on the numerical implementation of the methods you specify
Reviewing theoretical and experimental claims that bear on our roadmap
Building collaborations with academic groups, including for independent confirmation of key results
Helping the rest of the team understand the physics behind your conclusions
Your assessments will directly inform Snap Fusion's technology roadmap.
What we’re looking for
You will probably hold a PhD in theoretical nuclear physics or a closely related field, with research experience beyond it. Ideal candidates will have strong experience in several of the following areas:
Nuclear theory
Quantum scattering and reaction theory
Few-body or ab initio methods
Realistic nuclear interactions
Resonances, thresholds, and continuum physics
Low-energy charged-particle reactions
Fusion cross sections and astrophysical S-factors
Scientific leadership. You should be comfortable:
Running a research program with milestones and honest go/no-go decisions
Saying that a question cannot be answered with current theory, when it cannot
Writing clearly for readers who are not few-body specialists
Reviewing other people's derivations, and having your own reviewed
Like most few-body theorists, you will have done a good deal of numerical work, and that experience will be valuable here. But this is a physics role first: we have a computational physics lead, and implementation is a collaboration rather than the core of your job.
Industry experience is not required.
Bonus Points
Experience with any of the following is a plus:
Light-nuclei reaction calculations
R-matrix or related continuum methods
Nuclear astrophysics
Benchmark comparisons between methods or codes
Close collaboration with experimentalists
Refereeing and reviewing
Teaching or mentoring
Who thrives here?
You may be a great fit if:
You like physics questions with practical consequences
You would rather establish a modest result firmly than a striking one loosely
You are comfortable saying “we don't know yet” and explaining why
You enjoy making difficult material clear to colleagues from other fields
You want to see your work used
This role suits someone who wants to keep doing serious theory while seeing it put to use.
Why join Snap Fusion?
The questions you settle will feed into research in:
Fusion energy
Scientific discovery
Advanced simulation
AI for Physics
Quantum technologies
You will work alongside physicists and engineers on problems where careful theory has direct consequences. The work is early, the questions are real, and the standard is high.
Research
Senior
Bonus
Pay
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