R&D Test Engineer - Fluid Systems
Quick 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,
The role of an R&D Test Engineer is to develop novel fluid systems for R&D test stands, with a major focus on supporting magnet testing. The range of process fluids is broad (liquid, gaseous, cryogenic, supercritical, molten salt, etc.), requiring strong mechanical and chemical engineering fundamentals. The ideal candidate will be resourceful—combining industry best practices, off-the-shelf and customized hardware, and creativity to deliver these fluid systems on tight timelines.
Projects will be on varying scales, from smaller-scale test stands and deep system analysis to larger, complex projects as needed for SPARC and ARC. In addition to designing and building, the engineer will actively operate as a test engineer to commission systems and design automation alongside a team of test/software engineers and operators. You must work collaboratively across production, R&D, procurement, and the SPARC team. Various projects will also require flexing outside of traditional fluids engineering into other disciplines, such as structures and materials engineering, to successfully retire risks for SPARC and ARC.
- Hands-on experience executing the entire lifecycle of large-scale thermofluid systems
- Component expertise:
- Experience developing specifications, sizing and working with tanks, process piping, pumps, valves, compressors, purification stages, circulators, heat exchangers, etc.
- Design documentation:
- Strong background in establishing system requirements, generating process flow diagrams (PFDs), and developing piping and instrumentation diagrams (P&IDs)
- Instrumentation:
- Experience in the design, integration, and troubleshooting of system instrumentation
- Software and analysis tools:
- Experience utilizing engineering tools such as ANSYS, COMSOL, 1D compressible flow codes, Python and MATLAB
- Extreme environments:
- Practical experience designing, building, and commissioning fluid systems for specialized pressurized, cryogenic, vacuum, and/or elevated-temperature applications
- Vendor relations:
- Experience sourcing complex components, drafting technical specifications, and managing relationships with specialized vendors and suppliers
- Cross-functional communication:
- Strong ability to distill complex fluid system details and effectively communicate to non-experts and interfacing teams across R&D, production, and procurement
- Problem solving:
- Highly driven to challenge assumptions, make efficient technical decisions, and develop innovative solutions on tight timelines
- Ability to flex into adjacent engineering disciplines, such as structures or materials, when required to help retire risks for SPARC and ARC
- Process optimization:
- Strong aptitude for identifying bottlenecks and improving throughput during system designs, builds, and commissioning operations
#LI-Onsite
Location & Eligibility
Listing Details
- Posted
- July 2, 2026
- First seen
- July 3, 2026
- Last seen
- July 3, 2026
Posting Health
- Days active
- 0
- Repost count
- 0
- Trust Level
- 79%
- Scored at
- July 3, 2026
Signal breakdown
Please let Cfsenergy know you found this job on Jobera.
3 other jobs at Cfsenergy
View all →Explore open roles at Cfsenergy.
Similar R&D Test Engineer jobs
View all →Browse Similar Jobs
Stay ahead of the market
Get the latest job openings, salary trends, and hiring insights delivered to your inbox every week.
No spam. Unsubscribe at any time.