Commonwealth Fusion Systems
Senior R&D Test Engineer - Fluid Systems
$134K–$205K
Devens, MA · On-site · Senior · Full-time · Posted Sep 8, 2026
- Experience
- 7+ years.
- Education
- Bachelor’s degree in mechanical, chemical, process engineering, or a closely related field.
- Visa sponsorship
- The role requires compliance with U.S. export control laws; any offer is contingent on the need for compliance.
About the job
Design, build, commission, and operate fluid systems for R&D test stands, especially magnet testing, while developing system analyses, instrumentation, and automation.
What you'll do
- Design fluid systems and conduct system-level analyses and ANSYS structural and thermal simulations.
- Source components, specify or design custom parts, and manage vendor relationships.
- Coordinate system builds and commissioning, and design instrumentation and automation for safe operations.
What they ask for
- Bachelor’s degree in mechanical, chemical, process engineering, or a closely related field.
- 7+ years of experience engineering integrated fluid/mechanical systems.
- Hands-on experience executing the full lifecycle of large-scale thermofluid systems, including design documentation, instrumentation, and component specifications.
- Practical experience designing, building, and commissioning fluid systems for specialized pressurized, cryogenic, vacuum, and/or elevated-temperature applications.
Nice to have
- Experience with both small-scale rapid R&D and large-scale systems.
- Ability to work in adjacent engineering disciplines, such as structures or materials, and improve process throughput.
Pay
USD 134,000–205,000 base salary
Tools
ANSYS, COMSOL, 1D compressible flow codes, Python, MATLAB
Model-written summary · the original posting is authoritative