Senior Cryogenic Engineer

Job Description

Job Title: Senior Cryogenic Engineer. Location: Milpitas, California, United States

As part of this mission, PsiQuantum is seeking a Senior Cryogenic Engineer to design, install, & operate advanced cryogenic systems that support quantum computing environments.

Responsibilities:

• Lead the installation, commissioning, and operation of multiple helium cryoplants and related infrastructure.
• Optimize helium process control and cryogenic system efficiency.
• Integrate cryoplants with cryogenic distribution systems and cryostats used in quantum computing;
• Troubleshoot system issues, including vacuum failures, instrumentation faults, and control logic anomalies.
• Develop and execute maintenance programs for cryoplants and associated support equipment.
• Oversee system calibration, leak detection, and vacuum pumping procedures.
• Provide technical guidance and training for operational teams during startup, maintenance, and fault recovery.
• Participate in Factory Acceptance Tests (FATs) and Site Acceptance Tests (SATs).
• Lead development and review of Piping and Instrumentation Diagrams (P&IDs).
• Conduct HAZOP and operability reviews to ensure safety and reliability;
• Manage high-performance vacuum systems and perform leak identification and repairs.
• Collaborate with cross-functional teams to enhance system design and performance.

Qualifications:

• Master’s degree in Mechanical, Electrical, or Chemical Engineering.
• Minimum 5 years of experience in cryogenic systems, helium refrigeration, or related technologies;
• Strong hands-on experience in vacuum systems, PLC-based controls, and process instrumentation (pressure, flow, temperature, and vacuum sensors).
• Proven ability to diagnose and solve complex system issues under pressure.
• Experience leading commissioning or system integration projects in industrial or scientific facilities.
• Strong understanding of instrumentation design and control systems;
• Excellent communication and leadership skills with a focus on collaboration.

Benefits and Compensation:

• U.S. Base Salary Range: $150,000 – $180,000 USD
• Bay Area Salary Range: $170,000 – $200,000 USD
• Full-time roles include equity options, comprehensive benefits, and opportunities to work on cutting-edge quantum hardware projects;
• The company is committed to equal opportunity employment and welcomes candidates from all backgrounds.

Additional Information: Applicants should include the word “purple” in their cover letter; Only applications received through official PsiQuantum channels will be considered; PsiQuantum will never ask for bank details during recruitment; Candidates requiring visa sponsorship should indicate this during the application process.