Diagnostician
Commonwealth Fusion SystemsDevens, Massachusetts
Full Time
Posted November 21, 2025
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Job Description
The Diagnostician will support the design, fabrication, assembly, and operation of diagnostic systems for the SPARC tokamak, working as part of an integrated team to deliver precise measurements necessary for plasma control and fusion energy achievement.
Key Responsibilities
- Complete back-end design of diagnostic systems for SPARC tokamak
- Support fabrication, assembly, and commissioning of diagnostic subsystems
- Operate and utilize diagnostic systems to control plasma and collect scientific data
- Collaborate with team members, partners, and international fusion community to deliver measurements
- Contribute to the development and integration of multiple diagnostic technologies
Requirements
- Candidates must have experience working as part of an integrated diagnostic team supporting all major diagnostic systems, including magnetics, interferometry, neutral pressure, x-ray to visible spectroscopy, camera imaging, bolometry, neutrons, Thomson scattering, electron cyclotron emission, reflectometry, Langmuir probes, and structural temperature and strain sensing.
- Candidates must have experience in multiple diagnostics to support measurements on SPARC s fast timeline, demonstrating the need for a generalist with cross-diagnostic expertise.
- Candidates must have a minimum of 1 year of experience working with diagnostic systems in a fusion or plasma physics environment.
- Candidates must have a background in fusion science, plasma diagnostics, or related fields, and be capable of supporting diagnostics through fabrication, assembly, commissioning, and utilization phases.
- Candidates must be able to work as part of an integrated team collaborating with MIT-PSFC partners and global fusion community collaborators.
- Candidates must be willing to work on-site at CFS facilities, as indicated by the LI-Onsite designation.
- Candidates must comply with U.S. laws concerning the export of controlled or protected technologies or information, and any employment offer will be contingent on compliance with Export Control Laws.
Benefits & Perks
Competitive salary and compensation package (implied by industry standards and role level)
Work on cutting-edge fusion energy projects with high-impact scientific goals
Collaborative work environment with partnerships including MIT-PSFC and global fusion community
Opportunity to contribute to innovative diagnostics systems supporting fusion energy development
Diverse and inclusive workplace culture
Fast-paced environment that values integrity, execution, impact, and self-critique
Potential for career growth and development in fusion energy and related fields
Compliance with U.S. export control laws and related legal protections
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