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Manager, Field Mechanical Engineering Assembly

Commonwealth Fusion Systems

Job Location:

Devens, MA - USA

Monthly Salary: Not provided by the employer

Posted: 12 June 2026 (30+ days ago)

Application Deadline: 9 September 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 and suppliers to build the energy industry of the future.

Were in the best position to make it happen. Since 2018 weve raised nearly $3 billion in capital making us the largest and leading private 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 Manager Field Mechanical Engineering - Assembly

The Manager Field Mechanical Engineering - Assembly is a hands-on leader accountable for the management engineering oversight and problem-solving of a subset of several complex and unique work stations of the SPARC assembly process. As lead you will ensure the assembly plan is thorough tools are planned form and the necessary procedures are robust in advance of assembly. Additionally the role will support the troubleshooting and related decision making involved with first time and repeat assembly work. As lead the role includes the close collaboration with adjacent teams on the Assembly Team such as creating and incorporating the new process changes with the Assembly Process team or providing the Metrology team with any assistance or tools needed for the precision alignment of coils and other key structures. At the core your role is to keep the assembly process for your area of ownership moving smoothly in any and all ways managing the day-to-day changes in strategy or work orders problem-solving and making tools and using your engineering skills and knowledge to solve the many complex challenges that arise during the assembly process.

What youll do:

Lead a team of four to eight field mechanical engineers to plan and deliver on near to medium-term objectives for specific work stations within the SPARC Assembly Scope
Translate department-level strategy into actionable group objectives and manageable project timelines
Define and optimize field engineering workflows and internal standards to improve successful solution outcome rate and team efficiency
Oversee the full station scoping life cycle from predecessor/definition to tool and process implementation.
Establish and reinforce best practices for mechanical assembly including standards for aligning installation and rework
Manage all aspects of the groups talent including hiring training and setting clear performance expectations
Coach and mentor team members actively contributing to their technical growth and professional career development
Build relationships across the organization to influence design direction and resolve technical conflicts with stakeholders
Provide design feedback to SPARC sub-system designs with a focus on manufacturing and assembly. Participate in both formal and informal design reviews to ensure what is delivered can be assembled.
Assist in the disposition and resolution of non-conformance issues on parts or the process then working to incorporate and release red-line changes into an updated assembly sequence.
Support hands on operations during Tokamak Assembly serving a variety of roles in the process.
Work with teammates in a collaborative fashion to receive feedback early and often to ensure all requirements are met. Many SPARC projects involve high loads vacuum requirements and complex manipulation requiring the involvement and review of adjacent sub system experts.

What were looking for:

Civil Structural Mechanical or Aerospace Engineering B.S
2 years of Mechanical Engineering Experience demonstrating project ownership
2 years experience in management or oversight of an in-progress construction manufacturing or assembly/integration process.
2 years of experience with CAD software.

Bonus points for:

6 years of Mechanical Engineering Experience demonstrating project ownership.
4 years experience in management or oversight of an in-progress construction manufacturing or assembly/integration process.
3 years of experience with Siemens NX.
2 years of leading construction or assembly teams on complex assembly projects
Lifting operations experience
Knowledge of welding.
Knowledge of piping and tubing construction and joining.
Experience with highly complex or delicate assemblies.
Experience with assembly or integration in tightly packaged spaces.
Experience with fast-paced and dynamic construction manufacturing or assembly/integration builds.

Must-have Requirements:

Ability to occasionally lift up to 50 lbs
Perform activities such as typing standing stooping climbing or sitting for extended periods of time
Willingness to travel or work required nights/weekends/on-call occasionally for vendor visits during tool fabrication phases
Required onsite 5 days/week when assembly operations with relevant tools are underway with possible first or second shift assignment
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

$110000 - $185000 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-Onsite

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:

Manager

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