Diagnostician

Commonwealth Fusion Systems

Devens, Massachusetts

Full Time

Posted March 5, 2026

Not Specified

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Job Description

The Diagnostician will support the design, fabrication, assembly, and commissioning of diagnostic systems for the SPARC tokamak, working as part of an integrated team to deliver precise measurements essential for controlling plasma and achieving net fusion energy.

Key Responsibilities

Support the design, fabrication, assembly, commissioning, and utilization of diagnostic systems for the SPARC tokamak.
Work as part of an integrated diagnostic team to deliver measurements necessary for plasma control and scientific data collection.
Contribute to the development and support of approximately 40 diagnostic sub-systems, including magnetics, interferometry, spectroscopy, imaging, bolometry, neutron detection, Thomson scattering, and temperature/strain sensing.
Collaborate with partners and fusion community stakeholders to demonstrate net energy from the tokamak.

Requirements

Candidates must have experience working as part of an integrated diagnostic team supporting all major diagnostic systems used to control plasma and deliver scientific data in fusion research environments.
Candidates must have experience with multiple diagnostics, including but not limited to 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 the ability to support diagnostics through all phases including fabrication, assembly, commissioning, and utilization to meet fast project timelines.
Candidates must have a minimum of 2 years of experience working with diagnostic systems in a fusion or plasma physics environment.
Candidates must demonstrate the ability to work effectively as part of a multidisciplinary team including collaboration with partners such as MIT-PSFC and international fusion community collaborators.
Candidates must be willing to work on-site at the CFS facility, as the role is designated LI-Onsite.
Candidates must comply with U.S. laws concerning the export of controlled or protected technologies or information, including Export Control Laws, as a condition of employment.