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Salary
$107k – $160k per year
Location
In office (Devens)
Seniority
Senior · 5+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 29, 2026. First seen by Alion on Oct 28, 2026. Commonwealth Fusion Systems scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Commonwealth Fusion Systems is a commercial fusion energy company headquartered in Devens, Massachusetts, and founded in 2018. The firm specializes in the development of high-temperature superconducting magnets and compact tokamak devices, specifically the SPARC net-energy machine and the ARC commercial power plant. It operates through a strategic partnership with the Massachusetts Institute of Technology and focuses on scaling fusion technology to provide carbon-free, baseload power to global energy markets.

Join the power movement as a Mechanical Engineer

We are seeking a highly motivated and experienced Mechanical Engineer to join our manufacturing team. In this role, you will be responsible for providing technical expertise during the commissioning, implementation, and integration of manufacturing equipment. You will work closely with our production team to ensure that our manufacturing processes are optimized for efficiency, quality, and safety. Additionally, this position requires coverage or partial coverage for the second shift, as well as support for Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT) of equipment.

What you'll do:

    • Provide technical expertise during the commissioning, implementation, and integration of manufacturing equipment
    • Support Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT) of equipment
    • Troubleshoot mechanical issues and provide solutions to ensure equipment operates efficiently
    • Collaborate with production and engineering teams to optimize manufacturing processes and improve equipment performance
    • Drive continuous improvement initiatives for manufacturing equipment to increase efficiency, reduce downtime, and improve quality.
    • Conduct root cause analysis and implement corrective actions to resolve manufacturing issues
    • Proficient with 3D CAD software
    • Ensure compliance with all safety requirements
    • Create and maintain Process and Instrumentation Diagrams (P&IDs)
    • Understand and apply Geometric Dimensioning and Tolerancing (GD&T) principles
    • Work with external vendors and suppliers to ensure the timely delivery of equipment and materials
    • Conceptualize and detail new manufacturing equipment for scaled up manufacturing processes
    • Run experiments to determine the feasibility of new manufacturing processes and translate those learnings into practical designs

What we're looking for:

  • Bachelor's degree in Mechanical Engineering or a related field
  • 5+ years of experience in mechanical engineering, with a focus on manufacturing equipment
  • 3+ years of manufacturing equipment and tooling design
  • Strong knowledge of mechanical systems, including hydraulics, pneumatics, and motion control
  • Experience with 3D CAD packages and 2D drawings
  • Experience with Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT) of equipment
  • Understanding of GD&T and its application
  • Excellent problem solving and analytical skills
  • Strong communication and interpersonal skills, with the ability to collaborate effectively with cross-functional teams
  • Experience with commissioning and startup of manufacturing equipment

Bonus points for:

  • Strong knowledge of mechanical systems, including hydraulics, pneumatics, and motion control
  • Experience with production ramp-up and optimization of manufacturing processes
  • Experience with automated equipment and robotics

Must-have requirements:

  • Ability to lift up to 50 lbs occasionally
  • Perform activities such as typing, standing, stooping, and sitting, for extended periods of time
  • Willingness to occasionally travel or work required nights/weekends/on-call
  • Dedication to safety to mitigate hazards that may include heat, cold, noise, fumes, strong magnets, lead, high voltage, and cryogenics
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