Manager, Process Engineering - Assembly.

Hardware & Semiconductor Engineering Full-Time

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Manager, Process Engineering - Assembly: our view in 3 lines...

The Role:This role is for a manager leading process engineering work instructions and assembly planning for a fusion energy device.
The Person:The person will lead a team of process engineers, develop and release work instructions, refine assembly workflows, manage hiring and performance, and support design reviews and assembly operations.
Requirements:The ideal candidate has a Civil, Structural, Mechanical, or Aerospace Engineering BS, 7+ years of Mechanical Engineering Experience, 2+ years managing an engineering team, and 2+ years of CAD software experience.

About the 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, suppliers, and many others to build the energy industry of the future.

We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading 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 Manager, Process Engineering - Assembly

The Manager, Process Engineering is an organizational leader accountable for the management, engineering oversight, and efficient development and release of all engineering created work instructions across all elements of the SPARC Tokamak build. The role will manage a team of 8 to 15 engineers spread across the in work and soon to start stations of SPARC Assembly. As manager, the role at its core requires supporting the effective organization, tasking, and development of the individual contributors on the team while also driving efficiency and technical development tools to most effectively complete the thousands of planning tasks prior to the planned start of work. Additionally, the leadership role requires close collaboration with Field Assembly Engineering peers (who scope and discretize the work) and design engineering counterparts supplying inputs and technical detail. The role involves a high degree and quantity of decision making around technical approaches to a wide variety of mechanical challenges to keep the team unblocked and on task. At the core, the manager will refine existing processes, develop individual talent, and resolve pop up issues to create the most complete set of work instructions needed to build CFS’s technically complex SPARC Tokmakak.

Join the power movement as Manager, Process Engineering - Assembly

What you'll do:

Lead a team of eight to fifteen process engineers to develop, release and implement the technical engineering work instruction to construct the SPARC device

Translate department-level strategy into actionable group objectives and manageable project timelines

Define and optimize process engineering workflows and internal standards to improve successful solution outcome rate and team efficiency

Oversee the full development of tracking and priority tools to concurrently manage hundreds of individual planning tasks for the SPARC Assembly effort.

Establish and reinforce best practices for mechanical assembly, including standards for aligning, installation, and rework

Manage all aspects of the group's 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

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 we’re looking for:

Civil, Structural, Mechanical, or Aerospace Engineering BS
7+ years of Mechanical Engineering Experience demonstrating project ownership
2+ years experience directly managing an engineering team or a large scale engineering project as an individual contributor.
2+ years of experience with CAD software

Bonus points for:

8+ years of Mechanical Engineering Experience demonstrating project ownership
4+ years experience directly managing an engineering team or a large scale engineering project as an individual contributor
3 years of experience with Siemens NX
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

Travel occasionally required 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

#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.

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.

Published September 21, 2026

Location Devens, United Kingdom

Category Hardware & Semiconductor Engineering

Job Type Full-Time

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