Thea Energy is building an economical and scalable fusion energy system utilizing arrays of mass manufacturable magnets and dynamic software controls. Backed by Prelude Ventures.
About the role
We are seeking an experienced Senior HTS Magnet Cryogenics Engineer with at least 8 years of hands-on expertise to lead the thermal and cryogenic design of next-generation High-Temperature Superconducting (HTS) magnet systems and associated test facilities. You will bridge the gap between HTS coil performance, complex cryogenic cooling circuits, and thermal isolation to deliver reliable high-field magnet systems.
What they're looking for
- 8+ years of dedicated professional experience in cryogenic engineering, specifically applied to superconducting magnet systems (HTS preferred, LTS with strong HTS understanding is considered)
- Deep expertise in vacuum technology, and low-temperature material properties
- Proven experience in cooling superconducting magnets – MRI, accelerators or fusion systems
- Proven experience with cryogenic refrigeration systems (Gifford-McMahon, Pulse Tube, or Stirling cryocoolers or large cryoplants)
- Proficiency in thermal simulation software (ANSYS, COMSOL, or Thermal Desktop) and CAD systems (SolidWorks or NX)
- Practical laboratory experience with cryogens (LN_2, LHe), vacuum leak detection, and sensor integration (cernox, thermocouples)
More about this role
Thea Energy is leveraging recent breakthroughs in stellarator physics and engineering to create a faster and simpler approach to commercializing fusion energy. The company is reinventing the stellarator using computer-controlled arrays of planar coils thereby replacing the intricate, complex modular magnets required in all other stellarator architectures. Thea Energy is on a mission to create a limitless source of zero emission energy for a sustainable future.
We are seeking an experienced Senior HTS Magnet Cryogenics Engineer with at least 8 years of hands-on expertise to lead the thermal and cryogenic design of next-generation High-Temperature Superconducting (HTS) magnet systems and associated test facilities. You will bridge the gap between HTS coil performance, complex cryogenic cooling circuits, and thermal isolation to deliver reliable high-field magnet systems.
- Design, model, and integrate cryogenic cooling systems (conduction-cooled, cryo-fluid loops, or liquid helium/nitrogen systems) for HTS magnet assemblies.
- Perform thermal, fluid, and structural FEA modeling (e.g., ANSYS, COMSOL) to optimize temperature profiles, cooling margins, and quench behavior.
- Select,...
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