Combination Welder

Commonwealth Fusion Systems

190

Devens, MA, United States

Posted on: 2025-06-10

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 Combination Welder

The Materials Department at CFS supports design engineers, supply chain, and manufacturing by selecting materials and processes, unambiguously defining materials and processes, validating and measuring those materials and their properties, and conducting R&D to develop new materials and processes to enable fusion power deployment. The work is undertaken in support of delivering SPARC, the net energy tokamak under construction in Devens, MA, and ultimately in designing the ARC fusion power plant. These devices pose unique materials challenges including neutron fluxes produced by deuterium-tritium fusion, high heat loads, molten salt coolant systems, complex component topologies, high magnetic fields, and high cryogenic mechanical loads. To support this mission, the CFS Materials Department is seeking a combination welder to support the welding engineering team. This team supports welding process development for both in- and out-of-house superconducting magnet and tokamak assemblies. The welding engineering team works collaboratively across disciplines to develop weld geometry and techniques, weld specifications, and inspection methods needed for CFS components.

#LI-Onsite

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:

Always follow safety procedures

Develop advanced welding and joining processes for multiple manual, semi-automatic, mechanized, and robotic processes including but not limited to; GMAW, GTAW, FCAW, LBW, EBW, SAW, SW, Torch Brazing, Induction Brazing and hybrid processes

Conduct welding and joining qualification test on stainless steel, aluminum, copper, refractory and nickel based alloys

Set up and unbox welding equipment in a laboratory and production setting

Assist in the training and knowledge transfer of welding processes from R&D to production operations

Perform destructive and metallographic testing on welded samples for evaluation and analysis

Provide manufacturability feedback to engineers for weld geometries and tool access

Troubleshoot and resolve welding discrepancies with a focus on continuous improvement

What we’re looking for:

Highschool Diploma

5+ years experience as a welder and/or welding operator on large structural systems and tooling

Experience with fabrication of large metallic structures and advanced processes related to welding

Proficiency with GMAW, GTAW, FCAW processes and semi-automatic, mechanized and robotic equipment

Experience with laboratory methods for destructive weld and material analysis

Aptitude for picking up and learning advanced welding processes and equipment quickly

Excellent attention to detail

Knowledge of various forms of welding equipment and procedures

The capacity to work unsupervised

A detailed understanding of mathematical and numerical data and calculations

Project and time management

Knowledge of safety practices as they pertain to welding, cutting, and joining processes

Strong problem solving skills, ability to approach new problems with creativity

Ability to work effectively in a multidisciplinary team of engineers, scientists, technical staff, and others

Bonus points for:

AS in welding or fabrication technology

Proficiency in LBW, EBW, SAW, SW, Torch Brazing, Induction Brazing and hybrid processes

Proficiency welding stainless steels, copper, and aluminum alloys

Must-have Requirements:

Ability to lift up to 50 lbs regularly

Perform activities such as stooping, typing, standing, and 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

Willingness to travel occasionally or do required nights/weekends/on-call

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