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Senior HTS Magnet Cryogenics Engineer

KearnyOn-siteFull-time

AI Summary

Lead thermal and cryogenic design for next-generation HTS magnet systems and test facilities, bridging HTS coil performance with complex cryogenic cooling circuits and thermal isolation.

About this role

About Thea Energy:

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.

Position Overview:

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.

Key Responsibilities:

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, specify, and procure cryogenic hardware, including cryocoolers, thermal straps, current leads, vacuum vessels, and instrumentation.

Lead cryogenic testing, commissioning, and validation of HTS magnet prototypes from 20K up to 77K environments.

Troubleshoot thermal leaks, vacuum degradation, and cryogenic system integration issues during test campaigns.

Mentor junior engineers and collaborate directly with magnet designers, electrical engineers, and manufacturing teams.

Required Qualifications:

Experience:

8+ years of dedicated professional experience in cryogenic engineering, specifically applied to superconducting magnet systems (HTS preferred; LTS with strong HTS understanding is considered).

Education:

Bachelor’s or master’s degree in mechanical engineering, Aerospace Engineering, Applied Physics, or a related field (Ph.D. preferred).

Technical Skills:

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).

Preferred Qualifications:

Experience with HTS tape technologies (2G REBCO) and quench protection thermal modeling.

Hands-on design of high-current thermal leads (binary or HTS lead assemblies).

Background in building cryogenic test facilities for fusion energy, MRI/NMR systems, high-energy physics, or aerospace HTS applications.

Company Benefits:

Comprehensive health benefits (e.g. medical/dental/vision)

Employee equity stock options

20 days PTO

Skills

AnsysCernox SensorsCOMSOLCryocoolersCryogenic EngineeringCurrent LeadsFEA ModelingGifford-McMahonHTS Magnet SystemsLiquid HeliumLiquid NitrogenNxPulse TubeQuench ProtectionSolidWorksStirling CryocoolersThermal SimulationThermal StrapsThermocouplesVacuum Leak DetectionVacuum Technology

Senior HTS Magnet Cryogenics Engineer

About this role

Key Responsibilities:

Required Qualifications:

Preferred Qualifications:

Company Benefits:

Skills

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