Cryogenic Systems Engineer

Entangled Future; California; On-site; USD 150,000 - 210,000; Full time

Job summary

Equal1 is seeking an experienced Cryogenic Systems Engineer in California to join the cryomechanical and quantum system integration team. You will oversee development of compact mK cryocooler systems from concept to customer delivery, working with absorption and GM cooling, and supporting Joule-Thomson systems at 4K/30K stages.

The role requires strong cryogenic design expertise, thermodynamic and gas-flow modelling, plus hands-on knowledge of vacuum, helium handling, CAD, assembly and

Qualifications

• 10+ years of cryogenic system design experience.
• Experience with sub-4K cryostat design and low-temperature integration.
• Experience with GM, pulse tube, or Joule-Thomson cryocoolers.
• Knowledge of He-4 / He-3 phase diagram and cryogenic cooling cycles.
• CFD or thermal modelling experience.
• CAD basics for component design and 3D CAD familiarity.
• Practical understanding of vacuum and helium systems, assembly, and temperature control.
• Strong cross-disciplinary communication skills.

Responsibilities

• Develop thermodynamic and gas-flow concepts for cryogenic cooling systems.
• Simulate cooling cycles, gas flows, thermal performance, and system behaviour.
• Define concepts and requirements for cryogenic components with CAD teams.
• Support design and integration of cryogenic turbocompressor systems.
• Oversee manufacturing, assembly, integration, and testing of cryogenic systems.
• Collaborate with vacuum, helium handling, and instrumentation teams.
• Support certification and delivery of cryocooler systems to customers.

Job description

Cryogenic Systems Engineer at Equal1, California. A mid-level full time position in the Cryo-Systems team, listed under hardware engineering.

We are seeking an experienced Cryogenic Systems Engineer to join Equal1’s cryomechanical and quantum system integration team. In this role, you will oversee the development of compact mK cryocooler systems from concept through design, assembly, testing, certification, and customer delivery. You will work with absorption and GM coolers, and support the development of Joule-Thomson cryogenic turbocompressor systems with compression cycles at the 4K / 30K temperature stages.

The role requires strong cryogenic system design experience, thermodynamic and gas-flow modelling capability, and practical knowledge of vacuum systems, helium handling, CAD, assembly, and temperature control.

Responsibilities

• Develop thermodynamic and gas-flow concepts for cryogenic cooling systems, including He-4 and He-3 cycles.
• Simulate and analyse cooling cycles, gas flows, thermal performance, and system behaviour.
• Define concepts and requirements for cryogenic components and work with CAD/mechanical teams to realise the designs.
• Support the design and integration of Joule-Thomson cryogenic turbocompressor systems.
• Oversee manufacturing, assembly, integration, and testing of cryogenic systems and subsystems.
• Work with vacuum systems, helium handling, temperature control systems, sensors, and cryogenic instrumentation.
• Support certification and delivery of cryocooler systems to internal and external customers.

Requirements

• 10+ years’ experience in cryogenic system design.
• Experience with sub-4K cryostat design and low-temperature system integration.
• Experience with GM, pulse tube, and/or Joule-Thomson cryocoolers.
• Knowledge of the He-4 / He-3 phase diagram and cryogenic cooling cycles.
• CFD and/or thermal modelling experience.
• Knowledge of CAD systems, including basic 3D CAD for component design.
• Practical understanding of vacuum systems, helium systems, assembly methodologies, and temperature control.
• Strong communication skills and ability to work across multidisciplinary engineering teams.

Nice to Have

• Experience with turbo pumps and/or cryogenic turbocompressor design.
• Experience with CTE analysis and cooling cycle design.
• Experience supporting certification of complex technical equipment.