SECTION I · THE BRIEF
Brief #44220Updated 21 SEP 2026DEVENS, MALeverKHOSLA VENTURES
Employbl Company Profile

Senior Test Planning Engineer - Assembly

Commonwealth Fusion Systems (CFS) is an American company founded in 2018 aiming to build a compact nuclear fusion power plant based on the ARC tokamak reactor concept. The company is based in Cambridge, Massachusetts,…

Location
Devens, MA
Company size
500–2,000
Posted
Today
Via
Lever
Section II · Full ProfileFree with an account
  • 01Comp band & equity packageLocked
  • 02Seniority & experience requirementsLocked
  • 03Interview process & rubricLocked
  • 04Hiring manager & team contextLocked
  • 05Growth trajectory in this roleLocked
  • 06Offer & decision timelineLocked

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Senior Test Planning Engineer - Assembly

Commonwealth Fusion Systems· Devens, MAView company profile


Job title
Senior Test Planning Engineer - Assembly
Job location
Devens, MA
Job description
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 a Senior Test Planning Engineer - Assembly

This position is overall responsible for planning, drafting and achieving necessary approval of SPARC Assembly Test Products (test campaigns, plans, instructions, procedures) to accelerate project milestones.

What you'll do:
  • Transferrable knowledge / skillset to become adept / proficient in all defined specialized test methods from both an engineering and equipment operation perspective – specialized testing includes complexity or hazard introduction for design verification purposes (low voltage, high voltage, high stored energy, etc.)
  • Capability to mobilize entire test methods based on innovative technologies
  • Proficient at technical procedure writing – format clean & concise templates for iteration and version control
  • Adept at project risk analysis to establish trade-offs for test schedule gains without compromising safety and quality
  • Diligence (attention to detail) – thorough analysis of preliminary and final design reviews to identify opportunities / develop strategies for risk buy down via test methods
  • Exemplifies correct behaviors to establish a safety-conscience work environment & self-improving culture / learning organization – evident in test product development
  • Generate test procedures / instructions to ensure understanding of scope and identify & mitigate potential risks within both the engineering and technician teams
  • Incorporate test performance and safety standards into test products - pre-job briefs, procedural place keeping, procedural use and adherence, conservative bias, diligent monitoring of critical parameters, correct data capture, etc.
  • Process and action team feedback following test execution to leverage lessons learned, prevent error recurrence and optimize flow for ease of technician execution when deemed prudent
  • Lead complex troubleshooting actions plans and casual evaluations as a result of test anomalies
  • Develop software proficiency with SPARC Assembly workflow management for all test activities
  • Adhere to the highest standards of safety and ensure that activities taking place are being performed in strict accordance with CFS safety policies and applicable regulatory safety standards
  • Ensure that activities being performed in the field are conducted in accordance with CFS Standards, standards published by regulatory bodies (NFPA, ASME, ASTM, NET, OSHA, NIOSH, etc.) and Industry Best Practices
  • Occasional accommodation of off-normal work hours to support critical test activities
  • What we’re looking for:
  • BS in Engineering or related field
  • 7 Years of equivalent engineering experience
  • Previous testing experience with hazards
  • Previous electrical testing experience (high voltage)
  • High proficiency MS Office, Bluebeam or Acrobat, and 3D modeling programs
  • Bonus points for:
    • OSHA 10
    • NFPA 70E
    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
  • Required onsite 5 days/week when assembly operations with relevant tools are underway, with possible alternating 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
  • View job listing ↗
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    Commonwealth Fusion Systems headquarters

    Cambridge, MA

    Company size

    5002,000 employees

    Founded

    2018

    Total raised

    $3,877,000,000

    View company profile ↗

    Funding rounds