R&D Test Engineer: Electromechanical Test Systems

Commonwealth Fusion Systems; United States; On-site; USD 120,000 - 190,000; Full time

Benefits offered by this job

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

Job summary

Commonwealth Fusion Systems is seeking an R&D Test Engineer in the United States to drive testing and risk retirement for HTS magnet systems. You will design, build, and commission test equipment across mechanical, electrical, and process subsystems, partnering with manufacturing, R&D, procurement, and SPARC teams to meet aggressive timelines.

The role requires a strong foundation in mechanical, electrical or related physics disciplines, plus 5+ years delivering reliable data from specialized

Qualifications

• Bachelor's degree in engineering or science field required; mechanical/electrical engineering or applied physics preferred.
• 5+ years designing, building and commissioning specialized test or industrial equipment with proven data delivery.
• 1+ years using CAD software to design electromechanical assemblies.
• Understanding of mechanical loading, failure modes and material strength, including fasteners design.
• Knowledge of tolerancing, GD&T, form/fit/function, material selection, DFM and DFA.
• Solid grasp of electromagnetic fundamentals: voltage, current, resistance, Ohm’s law, AC/DC, solenoids.
• Strong troubleshooting and problem-solving skills with ability to innovate.
• Proven collaboration and active listening to facilitate productive discussions.
• Excellent written and verbal communication; high motivation and quick execution.

Responsibilities

• Own and retire technical risks by designing, procuring, building and commissioning test equipment.
• Develop test plans with instrumentation and controls for repeatable data.
• Prepare Test Readiness Reviews to ensure safety and necessity.
• Design experiments that match fast pace and schedules.
• Troubleshoot integration and test discrepancies during build and operation.
• Iterate on designs to improve test efficiency.
• Create analytical models from first principles to predict results.
• Compile results and communicate technical topics to both technical and non-technical audiences.

Skills

Mechanical design

Electrical systems

Data analysis

Problem solving

Instrumentation

Collaboration

Communication

Education

Bachelor's degree in engineering or science

Tools

CAD software

Job description

Commonwealth Fusion Systems is seeking an R&D Test Engineer in the United States to drive testing and risk retirement for HTS magnet systems. You will design, build, and commission test equipment across mechanical, electrical, and process subsystems, partnering with manufacturing, R&D, procurement, and SPARC teams to meet aggressive timelines.

The role requires a strong foundation in mechanical, electrical or related physics disciplines, plus 5+ years delivering reliable data from specialized