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Staff Mechanical Engineer Remote Maintenance

Commonwealth Fusion Systems

Job Location:

Devens, MA - USA

Yearly Salary: USD 130000 - 200000

Posted: 29 September 2026 (Yesterday)

Application Deadline: 27 December 2026

Vacancies: 1 Vacancy

Job Summary

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 were designing and building commercially viable fusion power plants. And were working with policymakers suppliers and many others to build the energy industry of the future.

Were in the best position to make it happen. Since 2018 weve raised $4 billion of capital making us the largest and leading fusion company in the world.

Now were looking for more thinkers doers builders and makers to join us. People wholl bring new perspectives solve tough problems and thrive as part of a team.

If thats you and this role fits we want to hear from you.

Join the power movement as a Staff Mechanical Engineer - Remote Maintenance

CFS is designing ARC as the worlds first commercial fusion power plant with the goal of bringing reliable and clean fusion energy to the grid. Due to device activation and commercial uptime needs ARC will need periodic fast and reliable maintenance to be performed fully remotely. This will require novel solutions and integration in the fields of robotics remote handling equipment (RHE) plant layout manufacturing and tokamak design. ARCs Remote Maintenance System will thus be a critical aspect of realizing CFSs mission to deliver the urgent transition to fusion energy.

The Remote Maintenance team is responsible for designing ARCs Remote Maintenance System. As a Staff Remote Maintenance Engineer on the team you will develop ARCs maintenance scheme by designing RHE and collaborating with tokamak and plant engineering teams in the design of a maintainable power plant. You will play a key role in ARCs pre-conceptual design phase along with other teams and navigate complex multi-disciplinary problems involving physics neutronics thermo-fluids structures maintenance manufacturing assembly techno-economics and other disciplines. This role also requires proactive R&D in novel remote maintenance technologies.

What youll do:

Lead the development and strategic execution of the operations for the ARC Remote Maintenance System
Drive the conceptual design process of the ARC fusion power plant providing experttechnical guidance for cross-functional teams
Lead the design of ARCs radiation hardened remote handling equipment (RHE) byincorporating a mix of existing robotic technologies custom hardware and remotely operated heavy lift equipment
Perform expert-level maintenance assessments of the tokamak and plant to shape thedevelopment of ARC as a remotely maintainable power plant defining processes that impact direct work and identifying/mitigating significant long-term risks
Collaborate closely with tokamak engineering teams to assist in designing the ARC tokamak for remote maintainability and finding creative and novel solutions for tokamak joints
Perform high level multi-disciplinary trade studies of solutions that involve complex and ambiguous us tradeoffs between physics neutronics mechanical thermo-fluids electrical maintenance materials manufacturing techno-economics and other disciplines
Lead multiple teams and manage projects to solve tough multi-disciplinary problems by resolving conflicts and driving key decisions across teams
Define and own the key R&D strategy needed for the ARC remote maintenance program and help establish/direct the plans for executing the R&D campaigns internally or with external partners
Research established and cutting-edge remote handling solutions to assess their application in the ARC remote maintenance system to influence strategic shifts and novel approaches to improve performance reduce cost and increase reliability
Work with external RHE/robotics organizations and general industry to manage contracted work collaborate on cutting edge R&D and transfer knowledge and expertise into CFS
Establish CFSs remote maintenance design principles for RHE the Tokamak and plant while propagating best practices and actively taking ownership of the growth and development of junior and peer engineers

What were looking for:

Structural Mechanical or Aerospace Engineering B.S
At least 10 years of mechanical engineering experience in the design fabrication testing operations integration and commissioning of complex mechanical structures (e.g. fusion fission aerospace marine)
At least 10 years of technical experience in the design of remote handling equipment (RHE) using robotics or remotely operated precision mechanical structures (e.g. remote welding/cutting manipulation alignment rescue inspections)
Proven track record of driving R&D campaigns of novel technology to increase TRL and unlock new design solutions in remote maintenance fields such as remote welding/cutting inspections bolting manipulation alignment sensing mechatronics rad hard and cleanliness
Deep expertise with standard actuation guidance mechanisms sensing and structural mechanisms
Expertise in structural analysis via both hand calcs and finite element analysis (Ansys preferred)
Familiar with CAD (NX preferred)
Ability to effectively lead a multidisciplinary team of engineers scientists technical staff executives and others
Ability to clearly communicate highly complex concepts to diverse audiences and build consensus
Safety conscious

Bonus points for:

Structural Mechanical or Aerospace Engineering M.S
Experience operating with near-complete independence to drive conceptual design of complex systems involving high level multi-disciplinary trade studies of both RHE and machine design (e.g. tokamak fission core sub-sea hardware aerospace)
Experience with the implementation of radiation hardened equipment and methods into RHE design
Experience with mechatronics or applied robotics
Experience with rescue or decommissioning RHE
Experience with site layout design of remotely operated facilities
Experience with activated waste handling (volume reduction casking)
Experience with remote cleanliness methods for UHV environments
Experience with industrial maintenance facility layout
Familiarity with basics of sensing high power controls and fluid systems
Familiarity with ultra high vacuum processes
Experience with fault tree analysis or fault management and recovery for complex integrated systems
Knowledge of fabrication methods such as welding and machining
Knowledge of engineering materials basics for metals and composites
Proficient in CAD (NX preferred)
Self-driven and autonomous capable of managing ambiguous assignments with loosely-defined outcomes
Aptitude to use data to drive decisions
Familiarity and experience with end-to-end processes with an emphasis on creativity and simplicity
The ability to thrive in fast-paced dynamic environments

Must-have Requirements:

Perform activities such as typing 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 or work required nights/weekends/on-call occasionally. Travel expected up to 15%

$130000 - $200000 a year

Salary range for this full-time position equity benefits.The actual salary will depend on level location qualifications and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations. Benefits include:

Competitive compensation with equity

13 Company-wide Holidays

Flexible vacation days

10 sick days

Generous parental leave policy

Health dental and vision insurance

401(k) with employer matching

Professional growth opportunities

Team-building activities

#LI-Hybrid

At CFS we excel in fast-paced environments driven by our values of integrity execution impact and self-critique. As we grow were 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.

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively Export Control Laws). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.

Required Experience:

Staff IC

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