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Assembly Test Implementation Engineer

Commonwealth Fusion Systems

Job Location:

Devens, MA - USA

Yearly Salary: $ 90000 - 145000

Posted: 26 August 2026 (2 days ago)

Application Deadline: 23 November 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 suppliers and many others to build the energy industry of the future.

Were in the best position to make it happen. Since 2018 weve raised $4 billion of capital making us the largest and leading 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 an Assembly Test Implementation Engineer

This position is overall responsible for the preparation execution and closure phases of all related SPARC Assembly test activities.

What youll 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.)
Support planning functions by scouting field assets for test instruction or procedure planning
Review and approve test procedures / instructions to ensure understanding of scope and identify & mitigate potential risks within both the engineering and technician teams
Collaborate with the technician team to execute a pre-test walkdown of unit or device under test sensor adjacent components subsystems systems or infrastructure to assess correct scope and hazard recognition when warranted
Collaborate with the technician team to execute custom builds of test equipment / features & mock-up testing for training / derisking purposes (pre-functional testing)
Develop software proficiency with SPARC Assembly workflow management for all test activities
Provide engineering direction when preparatory or execution impedances are encountered via simple or complex troubleshooting - decide between procedural intent and non-intent changes in the field
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
Reinforce test performance standards - pre-job briefs procedural place keeping procedural use and adherence conservative bias diligent monitoring of critical parameters correct data capture attention to detail etc.
Validate preliminary test outcomes - PASS FAIL UNCERTAIN with clear and succinct rationale / communication to integrated stakeholders
Collaborate with technician team to ensure full demobilization in the field / proper stowage of all inventory items.
Formal Test Engineering approval for all required test reports - signature authority
Debrief the test engineering team on performance / procedure feedback to leverage lessons learned prevent error recurrence and optimize flow for ease of technician execution when deemed prudent
Occasional accommodation of off-normal work hours to support critical test activities

What were looking for:

BS in Engineering or related field
5 Years of equivalent engineering experience
Previous testing experience with hazardsPrevious 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

$90000 - $145000 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

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:

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