Mechanical Engineer - Toroidal Field Coil

Commonwealth Fusion Systems•Devens, MA

68d•$90,000 - $145,000•Onsite

About The Position

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future. We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world. Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team. If that’s you and this role fits, we want to hear from you. Join the power movement as a Mechanical Engineer – Toroidal Field Coil Commonwealth Fusion Systems (CFS) collaborates with MIT to leverage groundbreaking high-temperature superconducting (HTS) magnet technology to build compact fusion power plants. As a Mechanical Engineer on the SPARC Toroidal Field (TF) Coil System Winding Pack team, you will act as a "Core Player"—a reliable and versatile contributor executing on mid-to-long-term assignments that are critical to the project's success. You’ll also work closely with peers across the organization - from other HTS magnet systems, R&D, Physics, Quality, Production, Assembly, Program Management - to ensure success of the SPARC mission. In this role, you will own technical execution of a key Winding Pack subassembly as it transitions from final design to physical reality. You will serve as the technical anchor on the manufacturing floor, using deep mechanical engineering fundamentals to resolve complex non-conformances and validate "as-built" conditions. This position offers a unique vantage point: by mastering the practical challenges of building and testing the SPARC TF coils today, you will build the deep, hands-on intuition required to design the high-field, superconducting magnet systems of the future. We are looking for a self-starter who values continuous learning and is eager to bridge the gap between rigorous analysis and rapid execution.

Requirements

Bachelor’s degree in mechanical engineering, aerospace engineering, physics, robotics, or another relevant field
Candidates with degrees in Electrical Engineering who have strong mechanical or structural engineering competency should feel encouraged to apply
3+ years' experience in design-build fundamentals: CAD (NX Preferred), component selection, structural analysis, design for manufacturing, GD&T
Experience working in an extremely fast paced environment
Experience taking a part from concept through production, with a proven ability to resolve technical hurdles in a manufacturing setting
Demonstrated ability to perform structural analysis via hand calculations and FEA (ANSYS Workbench preferred)
Familiarity with interpreting GD&T and inspection reports
A deep understanding of mechanical and structural engineering fundamentals
Familiarity with electromagnetic fundamentals – voltage, current, resistance, Ohm’s Law, AC/DC, right-hand rule, solenoids, etc
Ability to innovate creative solutions to challenging problems
A can-do attitude and an eagerness to learn
Ability to operate with general guidance and take independent ownership of execution approaches.
High self-motivation and drive to execute quickly
Effective at communicating technical topics to both technical and non-technical audiences
Alignment with CFS values of integrity, execution, impact, and self-critique
Ability to occasionally lift up to 50 lbs
Perform activities such as stooping, climbing, typing, standing or sitting for extended periods of time
Willingness to travel or work required nights/weekends/on-call occasionally
Work in a facility that contains industrial hazards including heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics

Nice To Haves

Prior experience in liaison engineering, field service, or manufacturing support where you worked physically near hardware to resolve integration issues
Experience with design and/or testing of complex electromechanical systems
Experience designing components for high vacuum and/or cryogenic operating environments
Experience in the development of technical specifications and procedures
Familiarity with other magnet systems or complex large-scale hardware (e.g., solenoids, pressure vessels, cryogenic systems)
Familiarity with fluid dynamics
Familiarity with programming languages (MATLAB, Python, etc.) especially oriented toward data analysis, data manipulation and data acquisition and control

Responsibilities

Use first principles physics as a basis for all decisions
Act as the primary technical resource for "shipside" support, collaborating closely with quality and manufacturing to solve emerging challenges during production, assembly, and installation
Perform structural and thermal calculations, ranging in complexity from first-principle hand calculations to FEA
Solve integrated engineering challenges across multiple disciplines to proactively mitigate engineering and operational risks
Generate detailed work plans and define milestones for the transition from component manufacturing to SPARC assembly
Anticipate operational trends and challenges, contributing to future-oriented planning for SPARC commissioning