Principal Magnet Cryogenics Engineer (HTS)

Location: Kearny, New Jersey, United States; on-site

Salary: $190,000–$215,000 per year

Company

hirify.global is developing commercial fusion energy using stellarator physics and computer-controlled arrays of planar coils.

What you will do

• Own the full lifecycle of large-scale HTS fusion magnet cryogenic systems from concept and design through fabrication, commissioning, and decommissioning.
• Design and validate gaseous helium and sub-cooled liquid nitrogen thermal-management systems for CICC and stacked-tape HTS conductors.
• Perform dynamic thermal-hydraulic modelling, transient load analysis, margin calculations, and quench-response design.
• Define requirements for megawatt-class cryogenic plants, compressors, heat exchangers, valve boxes, sub-coolers, and low-heat-leak transfer lines.
• Oversee cryogenic management of high-current HTS joints and gas-cooled hybrid current leads rated at 60+ kA.
• Lead vendors, multidisciplinary engineering teams, verification campaigns, cool-down, high-current testing, and operational validation.

Requirements

• 10–15+ years of direct cryogenic engineering and thermal-hydraulic design experience for superconducting magnet systems.
• Expertise in HTS tape and cable architectures, including REBCO, BSCCO, CICC, stacked-tape conductors, and forced-flow cooling.
• Experience delivering large-scale fusion or scientific-facility magnet programs and at least one system from concept through initial cool-down and operational validation.
• Knowledge of pressure-vessel and piping standards including ASME BPVC Section VIII, EN 13445, B31.3, ISO 21010, and CGA standards.
• Proficiency with FEA and thermal-hydraulic modelling tools such as COMSOL Multiphysics, ANSYS Thermal/CFD, and MATLAB/Simulink.
• Ability to lead cross-functional teams, prepare SRDs and ICDs, conduct design reviews, mentor engineers, and apply FMEA to cryogenic failure scenarios.

Culture & Benefits

• Medical, dental, and vision benefits.
• Employee equity stock options.
• 20 days of paid time off.
• Equal opportunity workplace committed to diversity and inclusion.
• AI tools may support parts of the hiring process, with final decisions made by humans.