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Staff Dimensional Engineer – SPARC
Job Location:
Job Location:
Devens, MA - USA
Yearly Salary:
USD 130000 - 200000
Yearly Salary:
Posted:
29 September 2026 (2 days ago)
Posted:
Application Deadline:
27 December 2026
Application Deadline:
Vacancies:
1 Vacancy
Vacancies:
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 a Staff Dimensional Engineer SPARC
SPARC is a first-of-a-kind machine and it presents some of the hardest dimensional management problems in industry today: large high-field magnets tight tolerances on complex geometries at meter scale novel materials and assembly stack-ups with no precedent to copy from. CFS is seeking a Staff Dimensional Engineer to be the technical authority for dimensional management across HTS Magnet production and the SPARC project.
This is a role for someone who wants to define a discipline not inherit one. You will own how design intent becomes buildable verifiable hardware: setting GD&T and datum strategy with Engineering analyzing variation propagation through assembly sequences before hardware proves it the hard way and defining what we measure and to what acceptance criteria. Your decisions will shape how fusion hardware is toleranced measured and accepted on SPARC and on the ARC power plants that follow.
You will work alongside a metrology team equipped with laser trackers portable CMM arms and structured-light scanning and with an established Quality Engineering organization that owns statistical process control and measurement system analysis so your focus stays on the geometry.
What youll do:
- Set GD&T and datum strategy in partnership with Engineering translating design intent into tolerancing that is functionally sound and manufacturable with our equipment and fabrication methods
- Perform tolerance stack-up and 3D variation analysis on large complex assemblies predicting variation propagation through build sequences and informing tooling indexing and assembly strategy
- Architect inspection requirements for large metallic components and assemblies defining what to measure how and to what acceptance criteria
- Drive key characteristic identification and flowdown from top-level assembly requirements to component drawings and supplier requirements
- Support disposition of Non-Conformance Reports with dimensional analysis quantifying the assembly-level impact of as-built deviations to inform use-as-is rework repair or scrap decisions
- Review engineering change packages for dimensional impact as designs mature through SPARC assembly and integration
- Coach QC Inspectors Quality Engineers and Design Engineers on GD&T interpretation and dimensional management practice
What were looking for:
- BS in Mechanical Industrial Materials Science Manufacturing or Aerospace Engineering
- 10 years of dimensional engineering experience on complex hardware (airframes vehicle structures turbomachinery large equipment or comparable)
- Mastery of GD&T (ASME Y14.5) as an author not only an interpreter: datum strategy tolerance allocation and drawing review authority; GDTP certification strongly preferred
- Proven tolerance stack-up capability both 1D (RSS worst-case) and 3D variation analysis (3DCS VisVA or equivalent)
- Experience applying dimensional management to large assemblies: indexing strategies key characteristics and assembly sequence variation
- Demonstrated ability to translate design intent into inspection requirements and acceptance criteria
- Excellent communication and organization skills
Bonus points for:
- Experience standing up dimensional management practices in a new program or organization (NPI clean-sheet aircraft or vehicle programs)
- Working knowledge of SPC process capability analysis MSA/Gage R&R and PFMEA
- Familiarity with metrology instruments applied to complex geometries (laser tracker portable arms CMM structured light)
- Knowledge of NDE methods (PT UT ET RT)
- Knowledge of cryogenics
- Minitab or JMP; MS Excel (including VBA); MS Visio
Must-have Requirements:
- Ability to occasionally lift up to 50 lbs
- Willingness to travel or work required nights/weekends/on-call occasionally
- Perform activities such as stooping climbing typing standing or sitting for extended periods of time
- 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
$130000 - $200000 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
#LI-Onsite
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:
Staff IC
