R&D Fusion Test Engineer — Lead Cryogenic Tests

Commonwealth Fusion Systems LLC; Northern (KY); Hybrid; USD 70,000 - 120,000; Full time

Benefits offered by this job

Health insurance

401(k) with employer matching

Equity

Flexible vacation

Parental leave

Professional growth opportunities

Job summary

Commonwealth Fusion Systems is seeking an experienced R&D Production Test Engineer to support testing and de-risk HTS magnet technology. You will lead cryogenic, vacuum, and high-current test campaigns, develop detailed procedures, and ensure data integrity while collaborating with magnet physicists and manufacturing experts.

The role requires a Bachelor’s in engineering or applied physics with 2+ years of hands-on testing experience. Travel, nights, weekends, and on-call work may be required.

Qualifications

• Bachelor’s (or higher) in engineering or applied physics.
• Minimum 2+ years of hands-on testing experience.
• Experience with test stand operation and data collection.
• Ability to design and evaluate test equipment and instrumentation.
• Strong understanding of electromagnetic fundamentals and troubleshooting complex systems.
• Excellent written and verbal communication and ability to work cross-functionally.
• Willingness to travel nights/weekends/on-call as needed.

Responsibilities

• Lead magnet and other test campaigns in cryogenic, vacuum, and high-current environments.
• Develop detailed test procedures and ensure data integrity with robust instrumentation and controls.
• Support improvements to test stands, optimizing for test rate and data quality.
• Design, analyze, and build test equipment, including mechanical, electrical, and fluid systems.
• Maintain and document test requirements, risks, and safety protocols.
• Manage test schedules, budgets, and technical documentation (P&IDs, CAD designs, schematics).
• Improve test processes for repeatability and efficiency.
• Analyze test data, create custom tools for data analysis, and present findings to cross-functional teams.
• Lead anomaly investigations and resolution, collaborating with physicists and engineers.

Skills

Test stand operation

Data collection

Cross-functional collaboration

Test planning

Data analysis

Test equipment design

Electromagnetic fundamentals

Process improvement

Communication

Self-motivated

Education

Bachelor's degree in engineering or applied physics

Tools

ANSYS

COMSOL

NX

Teamcenter

Ignition

Jira

Job description

Commonwealth Fusion Systems is seeking an experienced R&D Production Test Engineer to support testing and de-risk HTS magnet technology. You will lead cryogenic, vacuum, and high-current test campaigns, develop detailed procedures, and ensure data integrity while collaborating with magnet physicists and manufacturing experts.

The role requires a Bachelor’s in engineering or applied physics with 2+ years of hands-on testing experience. Travel, nights, weekends, and on-call work may be required.