R&D Engineer

Commonwealth Fusion Systems

. Work across multiple engineering disciplines and cross-functional teams to execute critical projects and tests .

Posted 11/12/2026full-timeSomerville • Massachusetts • United StatesMid-LevelSenior💰 $107,000 - $160,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing, analyzing, and commissioning complex mechanical and electro-mechanical assemblies, with a strong focus on safety, documentation, and collaboration across engineering disciplines. Proficient in CAD software and familiar with electromagnetic fundamentals, ensuring effective communication and problem-solving in technical environments.

Highest-signal resume keywords

Mechanical Engineering Degree3+ Years CAD Software ExperienceStructural FEA Using ANSYS or COMSOLElectromagnetic Fundamentals KnowledgeExport Control Laws Compliance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Mechanical Assembly DesignElectro-Mechanical SystemsGD&T and Tolerance Stack-UpStrength of Materials AnalysisTroubleshooting and Problem-SolvingData Analysis and ValidationJob Hazard AssessmentsFluid Systems DesignThermal AnalysisFirst-Principles Analysis

Soft Skills

Effective CommunicationCollaboration SkillsAttention to DetailSelf-MotivationCan-Do Attitude

Tools & Technologies

ANSYSCOMSOLNXTeamcenterPythonMATLAB

Industry Keywords

High-Voltage Equipment DesignHigh-Current Equipment DesignIndustrial HazardsTest Readiness ReviewsPrototyping

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Work across multiple engineering disciplines and cross-functional teams to execute critical projects and tests
Systematically retire technical risks for HTS Cable Magnets through experiments, prototypes, and specialized test stands
Partner with R&D, Design, Manufacturing, and Procurement to evaluate requirements, clarify test objectives, and align stakeholders
Design, analyze, review, procure, and build mechanical assemblies and test equipment, including structures, fluid systems, pressure vessels, mechanical systems, and electro-mechanical systems
Plan tests with Test Engineers, define instrumentation and controls, collect key data, and validate data reliability
Maintain documented requirements and risks for systems or components under test
Identify and mitigate safety hazards; produce job hazard assessments and test readiness reviews
Maintain project documentation and schedules, including design reviews, wiring lists, P&IDs, schematics, CAD assemblies, drawings, and technician work instructions
Perform structural, thermal, fluid, first-principles, and/or FEA analyses
Troubleshoot and resolve integration discrepancies during build and commissioning
Iterate on designs, equipment, and operations to improve them
Commission setups, run experiments safely and methodically, analyze data, and communicate results to the broader organization

Requirements

What you’ll need

Bachelors degree in engineering or science field is required; Mechanical engineering or similar, or applied physics degree
3+ years experience designing, analyzing, fabricating, and commissioning complex mechanical and electro-mechanical assemblies
3+ years using CAD software to design complex assemblies, producing drawings for procurement with a working knowledge of GD&T and tolerance stack-up
3+ years experience with analysis of mechanical components, strength of materials and failure criteria; familiarity with fasteners, welds, and bolted joints
Familiarity with electromagnetic fundamentals including voltage, current, resistance, Ohm’s Law, AC/DC, right-hand rule, and solenoids
Excellent troubleshooting and problem-solving skills with great attention to detail
Effective communication of technical topics to technical and non-technical audiences
High self-motivation and drive to execute quickly
Can-do attitude and eagerness to learn and/or teach junior engineers/technicians
Collaboration skills including active listening and facilitating productive discourse
Ability to innovate creative solutions and challenge the status quo
Ability to occasionally lift up to 50 lbs
Ability to type, climb, stand, stoop, or sit for extended periods
Willingness to occasionally travel or work required nights, weekends, or on-call
Ability to work in a facility with industrial hazards including heat, cold, noise, fumes, strong magnets, lead, high voltage, high current, pressure systems, and cryogenics
Export Control Laws compliance required
Bonus: 5+ years of relevant experience; structural FEA using ANSYS or COMSOL; multiphysics analysis; NX and Teamcenter; high-field magnet testing; Python or MATLAB; high-voltage/high-current power equipment design and use

Benefits

Comp & perks

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