Senior Mechanical Engineer, Diagnostics

Commonwealth Fusion Systems

full-time

Posted on: 9/9/2025

Origin: • 🇺🇸 United States • Massachusetts

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💰 $110,000 - $185,000 per year

Senior

AssemblyERPRaySwitching

About the role

Support the diagnostic systems in the design of components by applying multi-disciplinary engineering and design skills to a variety of diagnostic systems
Contribute to a strong safety culture while helping to commission and operate SPARC diagnostics
Grow expertise that helps CFS build a core competency in fusion measurement tools that can deliver future tokamaks optimized for power production
Project areas can range over multiple topics including design, analysis, and testing of large structures, packaging and assembly constrained piping and wiring components, radiation shielding, support and interfacing structures for scientific measurement tools
Detailed component design and assembly layout in CAD; development of assembly and installation procedures for large assemblies
Rapid prototyping and design of benchtop and rackmount parts that interface custom SPARC components to COTS equipment
Structural, civil, and thermal analysis; collaboration with other CFS teams and external vendors to verify design functionality and manufacturability
Developing and executing benchtop tests of prototypes; supporting resolution of technical issues that arise during manufacturing of SPARC diagnostic equipment
Providing hands on support for diagnostic assembly and calibration, providing feedback on the impact of field changes during installation

At least a bachelor’s degree in a relevant engineering field (manufacturing, mechanical or aerospace)
4+ years' experience as a manufacturing engineering manager in new manufacturing production launch / new facility startups
Experience taking products from R&D into production
Excellent time management and organizational skills and experience establishing guidelines in these areas for others
Experience with ERP/MES software for manufacturing processes and inventory control
Proficiency in work instruction writing, material planning, process mapping, and capacity modeling
Flexible thinking, including the ability to pivot and try new approaches when faced with challenges
An eagerness and innate curiosity to learn more about SPARC
Ability to direct staff accomplishing complex tasks where a full understanding is not possible
Be able to maintain productivity while also experiencing high-levels of context switching
Ability to occasionally lift up to 50 lbs
Perform activities such as climbing, typing, standing, or sitting for extended periods of time
Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, cryogenics, ionizing radiation and vacuum/pressure
Willingness to occasionally travel or work required nights/weekends/on-call