Intern - Plasma Physics - Summer 2026

Number of employees

190

Devens, MA, United States

Posted on: 2025-08-29

Category: renewables

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Employment type:

Internship

Experience required:

Intern

Salary

Salary not provided

About the company:

Commonwealth Fusion Systems (CFS) has the fastest, lowest cost path to commercial fusion energy. 

CFS is collaborating with MIT to leverage decades of research combined with new groundbreaking high-temperature superconducting (HTS) magnet technology. HTS magnets will enable compact fusion power plants that can be constructed faster and at lower cost. 

The mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. CFS has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by the world’s leading investors, CFS is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. 

If you are interested in joining our team, check out cfs.energy/careers for more information.

About Commonwealth Fusion Systems: 

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.

Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future. 

We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world.

Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team. 

If that’s you and this role fits, we want to hear from you.

Join the power movement as a Plasma Physics Intern

CFS is seeking an Intern with knowledge in Plasma Physics.

At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.

Program Details:

  • 12-16 week internship program
  • 40-50 hours per week with set hourly salary based on year in school
  • Opportunity for this position is in Devens, MA. If an intern is going to be on site, you will be responsible for your own transportation and housing
  • Specific project assignments and required technical skillset will vary based on the team’s existing need.
  • Opportunities available for currently enrolled college students in all levels of schooling from bachelor’s degree to PhD
  • Interns must be authorized to work in the United States for any employer
  • What you'll do:

  • Develop workflows, algorithms, and results for the Boundary Plasma Physics team in support of SPARC operations
  • What we’re looking for:

  • Experience in plasma physics or with tokamaks, but also is eager to learn about engineering
  • Good software skills and an ability to program in python
  • Cross disciplinary experience is a bonus
  • Hands-on experience through academic research, project teams, machine shops, hackathons, or industry internships
  • Demonstration of exceptional results through a range of different pursuits
  • High self-motivation and drive to execute quickly with excellent troubleshooting/problem-solving skills
  • Essential Requirements:

  • Willingness to travel or work required nights/weekends/on-call occasionally
  • Perform activities such as typing, standing, or sitting for extended periods of time
  • Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics
  • #LI-Onsite
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