Subassemblies Specialist (Fusion Energy)

Location: Devens, Massachusetts, United States; on-site

Salary: $90,000–$145,000 per year, plus equity and benefits.

Company

Develops commercially viable fusion power plants and the SPARC tokamak to accelerate the transition to fusion energy.

What you will do

• Build complex subassemblies and components for the SPARC tokamak while maintaining strict cleanliness requirements.
• Oversee contract technicians and ensure compliance with work instructions and quality standards.
• Perform helium leak checks, testing, and equipment check-outs.
• Collaborate with scientists and engineers to refine work instructions and finalize component tooling interfaces.
• Assist with precision alignment and installation of active and passive optical systems.
• Develop responses to field non-conformances and support related skilled work across assembly teams.

Requirements

• High school diploma or equivalent experience.
• 5–7 years of experience in a highly technical assembly role, such as aerospace, semiconductor, automotive, laboratory, or energy equipment assembly.
• At least 2 years leading a team of four or more people.
• Experience with tooling design, large-scale projects, measurement tools, basic machining, forklift operation, and rigging or lifting heavy components.
• Experience using Jira, Manufacturo, or comparable production-tracking software.
• Ability to work on-site in Devens, Massachusetts, occasionally travel for required nights, weekends, or on-call duties, and lift up to 50 lbs.

Nice to have

• Welding experience.
• Knowledge of cleanroom best practices, cryogenic systems, or Six Sigma processes.

Culture & Benefits

• Work in a fast-paced environment focused on integrity, execution, impact, and self-critique.
• 13 company-wide holidays, flexible vacation days, and 10 sick days.
• Health, dental, and vision insurance.
• 401(k) with employer matching and competitive compensation with equity.
• Generous parental leave, professional growth opportunities, and team-building activities.
• Safety procedures address industrial hazards including heat, cold, noise, fumes, strong magnets, lead, high voltage, and cryogenics.