Subassemblies Specialist
cfsenergy· Assembly
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 Senior Subassemblies Specialist
The Subassemblies team is responsible for delivering precision, ultra high vacuum subassemblies for seven major teams that go into the SPARC Tokamak. As a Subassemblies Specialist, you will be the last set of hands and eyes on critical parts; as such, meticulous attention to detail in build quality is necessary. You will draw upon your years of technical experience building complex systems to help streamline workflows and deliver the best possible parts. Once all the subassemblies are built (roughly a two year timeline) you will be uniquely qualified to install the subassemblies into the Tokamak and your role will transition to the Assembly of the machine. This role is truly a once in a lifetime opportunity to use hands-on assembly skills to accelerate the development of fusion energy by ensuring SPARC is built on time and to high quality. The main systems you will be building are high power RF antennas, plasma facing components, port plugs, error field correction coils, vertical stability coils and plasma diagnostics; the bespoke tools used for real-time control of a burning plasma and to achieve SPARC's science mission.
Frequently Asked Questions
What is the salary for the Subassemblies Specialist role at cfsenergy?
The listed salary for this Subassemblies Specialist position at cfsenergy is USD 90K–145K. This is an Full time role.
Where is the Subassemblies Specialist position at cfsenergy located?
This Subassemblies Specialist 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 Subassemblies Specialist role at cfsenergy full-time or part-time?
This is listed as a Full time position. It is posted as a Subassemblies Specialist role in the Assembly department at cfsenergy.
Which team or department does the Subassemblies Specialist at cfsenergy belong to?
This Subassemblies Specialist position is part of the Assembly department at cfsenergy. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Subassemblies Specialist 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 Subassemblies Specialist job at cfsenergy posted?
This Subassemblies Specialist position at cfsenergy was posted on May 11, 2026. Apply as soon as possible — early applications are often reviewed first.
Subassemblies Specialist
cfsenergy · 💰 USD 90K–145K
You'll be redirected to cfsenergy's official application page on Lever.