About this role
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 we're 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 R&D Engineer
Most fusion-relevant superconducting magnets undergo high voltage transients that must be designed and tested against—using protection schemes that must take high and poor vacuum effects into account (e.g. the Paschen effect). This role is aimed towards research and development of high voltage systems for superconducting magnets with a focus on the Paschen effect including the execution and development of test campaigns as well as leading RCCA efforts through analysis and testing to resolve issues that may arise with the SPARC / ARC magnets currently in production, tokamak integration, and commissioning. Magnet technology is inherently multidisciplinary, and a successful R&D engineer will seamlessly flex between disciplines and groups to effectively execute tests and projects on aggressive schedules supporting CFS's mission. The R&D Engineer must have a fundamental understanding of mechanical, electrical, materials, fluids and software engineering, or some combination thereof—with a focus on high voltage systems in vacuum. The R&D Engineer will be responsible for the design, build, and commissioning of equipment and/or software in support of development, qualification and production tests related to high voltage systems inside vacuum. They must work collaboratively across manufacturing, R&D, procurement, and SPARC teams to achieve their test campaigns. It is also the role of the R&D Engineer to constantly push and challenge the requirements, risks, and test objectives that they are provided to help the combined stakeholders come to a consensus on why the planned test is required and what data is deemed essential for the outcome to be achieved.
Frequently Asked Questions
What is the salary for the R&D Engineer - High Voltage role at cfsenergy?
The listed salary for this R&D Engineer - High Voltage position at cfsenergy is USD 70K–120K. This is an Full time role.
Where is the R&D Engineer - High Voltage position at cfsenergy located?
This R&D Engineer - High Voltage role at cfsenergy is based in Devens, MA. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the R&D Engineer - High Voltage role at cfsenergy full-time or part-time?
This is listed as a Full time position. It is posted as a R&D Engineer - High Voltage role in the R&D Test department at cfsenergy.
Which team or department does the R&D Engineer - High Voltage at cfsenergy belong to?
This R&D Engineer - High Voltage position is part of the R&D Test department at cfsenergy. See the full job description for more information about the team structure and responsibilities.
How do I apply for the R&D Engineer - High Voltage position at cfsenergy?
Click the "Apply Now" button on this page. You will be redirected to cfsenergy's official application portal hosted on lever where you can submit your application directly.
When was the R&D Engineer - High Voltage job at cfsenergy posted?
This R&D Engineer - High Voltage position at cfsenergy was posted on Aug 14, 2026. Apply as soon as possible — early applications are often reviewed first.