Senior Mechanical Engineer: Cryogenic Pressure Systems for Accelerators

Subcritical Systems Inc; Austin (TX); On-site; USD 120,000 - 190,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

Job summary

Subcritical Systems, Inc. in Austin, TX is hiring a Mechanical Engineer – Pressure Systems to lead the design, development, and deployment of large cryogenic pressure and test systems for our superconducting accelerator hardware.

This in-person role requires hands-on leadership and collaboration across engineers, scientists, trades, and vendors. You will perform analyses, risk assessments, and safety reviews, validate designs with ATLAS-enabled workflows, and produce clear test reports.

Qualifications

• Master's degree in mechanical engineering; PE certification desired.
• 7+ years of relevant experience (or 15+ years in professional practice).
• Hands-on experience building, testing, assembling and designing cryomodules.
• Strong expertise in pressure systems and leak testing.
• Practical knowledge of ASME BPVC, ANSI standards, and US cryogenic pressure systems requirements.
• Experience with nondestructive testing and leak testing techniques, including helium mass spectrometry.
• Ability to read and interpret mechanical, P&ID, weld, and fabrication drawings; produce clear engineering docs.
• Bias for action and ability to coordinate across engineers, scientists, trades, vendors, and executives, including AI-assisted platforms like ATLAS.

Responsibilities

• Lead design, development, and deployment of large cryogenic pressure and test systems for superconducting accelerator hardware.
• Develop, build, and execute analyses to verify functionality, performance, and safety; incorporate validated models.
• Conduct risk assessments and support hazard analyses, safety reviews, and test readiness reviews.
• Diagnose, troubleshoot, and resolve design and analysis issues.
• Use modelling, simulation, and tests to evaluate system behavior and validate designs.
• Lead reviews, data analysis, and creation of test reports and technical documentation.
• Maintain a strong safety culture across the team.

Skills

Cryogenic systems

Pressure testing

Engineering analysis

AI-assisted platforms (ATLAS)

Education

Master's in mechanical engineering

PE certification desired

Tools

ATLAS

Helium mass spectrometry leak testing

Job description

Subcritical Systems, Inc. in Austin, TX is hiring a Mechanical Engineer – Pressure Systems to lead the design, development, and deployment of large cryogenic pressure and test systems for our superconducting accelerator hardware.

This in-person role requires hands-on leadership and collaboration across engineers, scientists, trades, and vendors. You will perform analyses, risk assessments, and safety reviews, validate designs with ATLAS-enabled workflows, and produce clear test reports.