Senior Dimensional Engineer — SPARC Fusion Hardware

Commonwealth Fusion; Harvard (MA); On-site; USD 130,000 - 200,000; Full time

Benefits offered by this job

Equity

13 company‑wide holidays

Flexible vacation days

Health, dental, and vision insurance

401(k) with employer matching

Professional growth opportunities

Job summary

Commonwealth Fusion Systems seeks a Staff Dimensional Engineer to lead dimensional management across SPARC magnet production and future ARC plants. You will define GD&T, tolerance strategies, and acceptance criteria to ensure buildable, verifiable hardware.

You will supervise a metrology team and collaborate with Quality Engineering to control variation through assemblies, supporting design changes and supplier requirements.

Qualifications

• BS in Mechanical, Industrial, Materials Science, Manufacturing, or Aerospace Engineering.
• 10+ years in dimensional engineering on complex hardware.
• Mastery of GD&T (ASME Y14.5) as author and reviewer; GDTP certified preferred.
• Proven tolerance stack‑up capability (1D RSS and 3D variation).
• Experience applying dimensional management to large assemblies and development of inspection criteria.
• Ability to translate design intent into verifiable inspection requirements and acceptance criteria.
• Excellent communication and organizational skills.

Responsibilities

• Set GD&T and datum strategy aligning with design intent and manufacturability.
• Perform 3D variation analysis and stack‑up on large assemblies.
• Architect inspection requirements for large components and assemblies.
• Drive identification and flow‑down of key characteristics to drawings and supplier requirements.
• Support disposition of Non-Conformance with dimensional impact analysis.
• Review engineering changes for dimensional impact during SPARC assembly.
• Coach QC Inspectors and design engineers on GD&T interpretation.

Skills

GD&T mastery

Tolerance analysis

Dimensional management

Metrology knowledge

Inspection requirements

Education

BS in Mechanical/Industrial/Materials/Aerospace

Tools

3DCS

VisVA

MS Excel

Job description

Commonwealth Fusion Systems seeks a Staff Dimensional Engineer to lead dimensional management across SPARC magnet production and future ARC plants. You will define GD&T, tolerance strategies, and acceptance criteria to ensure buildable, verifiable hardware.

You will supervise a metrology team and collaborate with Quality Engineering to control variation through assemblies, supporting design changes and supplier requirements.