Mechanical Engineer – Cable Magnets

Commonwealth Fusion Systems

190

Devens, MA, United States

Posted on: 2025-04-18

Category: renewables

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Employment type:

Full time

Experience required:

Intermediate

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 over $2 billion in capital – more than any other fusion energy company in the U.S.

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 Mechanical Engineer – Cable Magnets

As a Mechanical Engineer for the SPARC superconducting cable magnets, you will own hardware from early concepts to SPARC delivery, performing thermal, structural, and electromagnetic analysis using hand calculations and finite element methods. You will develop design notes, technical specifications, assembly procedures and documentation necessary to manufacture and install the hardware and supporting systems. In your role you will also support procurement in the preparation and execution of manufacturing contracts.

#LI-Hybrid

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.

What you'll do:

Produce new and iterate on existing design concepts using NX, using a deep understanding of physics and structural mechanics for both metallics and composites

Perform thermal, structural, and electromagnetic analysis to inform decisions on SPARC magnets, including conductors, insulation, joints, supports, fluid manifolds, insulator breaks

Own product from final design through final assembly and commissioning for SPARC, ensuring SPARC is able to achieve first plasma on-schedule

Diagnose issues on the production and assembly line and provide path forward based on known understanding of hardware

Work with the SPARC plant and tokamak operations team to integrate the system into overall control system architecture· Work with experimental teams on instrumentation, measurement, and correlation of experiment to analysis

Provide technical support to procurement during manufacturing

Prepare reports, presentations, and other documentation to serve as design review and validation

Develop team systems to better serve the magnet systems teams during the ARC era

What we're looking for:

Bachelor’s degree in mechanical engineering, aerospace engineering, physics, or another relevant field

At least 3 years of engineering design and analysis experience

At least 1 year providing engineering support to production hardware in the form of resolving technical issues and executing design changes for manufacturing ramp up

Excellent fundamental knowledge of mechanical systems such as static structures and heat transfer. Relevant hands-on experience in the form of parts designed for high loads and extreme environments

Demonstrated record of design of mechanical components beyond desktop scale. E.g. high power (MW+), high mass (ton+), high force (MN+)

Solid background in component design and performing detailed analyses

Familiarity with all steps in the design process with an emphasis on creativity and simplicity

Authored documentation in the form of specifications to drive requirements to manufacturing and assembly.

Be self-motivated and exhibit excellent problem-solving skills

Bonus points for:

Experience with vacuum, cryogenics, nuclear irradiation, superconductivity, electromagnetics

Hands on experience developing and executing testing to buy down technical risk in new hardware development

Knowledge of the design, analysis and installation of components in a ultra high vacuum environment

Worked under a formal program for quality assurance and quality control.

Must-have requirements:

Perform activities such as sitting for extended periods of time

Work in a facility that contains industrial hazards including heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics

Perform activities such as sitting for extended periods of time

Work in a facility that contains industrial hazards including heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics

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