Subassemblies Technician

Commonwealth Fusion Systems•Devens, MA

7d•$30 - $52•Onsite

About The Position

Commonwealth Fusion Systems is seeking a Subassemblies Technician to build precision, ultra-high-vacuum subassemblies for the SPARC Tokamak. The Subassemblies team supports seven major teams, and the technician will be responsible for the quality and cleanliness of critical parts. The role involves using technical assembly experience to improve workflows and deliver high-quality components on schedule. The technician will build systems including high-power RF antennas, plasma-facing components, port plugs, error field correction coils, vertical stability coils, and plasma diagnostics. These components and bespoke tools support real-time control of a burning plasma and SPARC’s science mission. The position involves working with scientists and engineers, maintaining clean work areas and clean-room standards, supporting precision alignment and installation of optical systems, and helping resolve field non-conformances. The role may require long hours and occasional travel, including nights, weekends, or on-call work.

Requirements

High school diploma or equivalent experience.
At least 7 years of experience in a highly technical assembly role, such as aerospace/aircraft, racing, semiconductor, oil and gas, laboratory, wind, or automotive.
Ability to learn from mistakes and apply those lessons.
Ability to operate a forklift.
Experience building intricate projects end to end.
Ability to use basic machining tools, such as a lathe or mill.
Experience using measurement tools.
Experience rigging and lifting heavy components.
Highly self-motivated and organized, with passion for the work and curiosity about what the company is building.
Willingness to work long hours when needed and learn new skills.
Ability to occasionally lift up to 50 lbs.
Ability to sit, climb, stoop, type, and stand for extended periods.
Willingness to travel occasionally for required nights, weekends, or on-call work.
Dedication to safety when working around industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead, high voltage, and cryogenics.

Nice To Haves

Soldering experience.
Knowledge of clean-room best practices.
Knowledge of cryogenic systems.

Responsibilities

Build complex and simple subassemblies and components while maintaining cleanliness specifications.
Perform testing and checkouts, including helium leak checking and use of other checkout equipment.
Work with scientists and engineers to ensure assemblies meet their design intent.
Assist with precision alignment and installation of active and passive optical systems.
Help maintain required cleanliness in the work area and clean room.
Participate in first encounter reviews to address non-conformances encountered in the field.