Senior Mechanical Engineer, SRF Cryomodules

Subcritical Systems; Austin (TX); On-site; USD 110,000 - 150,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Job summary

Subcritical Systems is hiring for a role leading the mechanical design of SRF cryomodules, aligning superconducting cavities for high-precision beamlines. You will collaborate with SRF, cryogenic, RF, vacuum, and manufacturing teams to move designs from concept through assembly and cold testing in an in-person Austin setting.

You will apply thermal, structural, and metrology expertise to meet demanding heat-load budgets and alignment requirements, while feeding data into ATLAS to guide future

Qualifications

• Bachelor's degree in Mechanical Engineering or related discipline; master's preferred.
• 4+ years in mechanical engineering on cryogenic, vacuum, or precision accelerator hardware, or 10+ years with relevant exposure.
• Experience with low-temperature heat transfer and cryogenic materials.
• Ability to perform thermal, structural, and modal analyses with standard tools.

Responsibilities

• Own cryomodule mechanical design: vacuum vessel, shields, cold-mass supports, interconnects from concept to drawings.
• Perform and review thermal analyses to set heat-load budgets at 2 K, 4 K, 40–80 K.
• Participate in 3D FEA to characterize device performance (modal frequencies, couplings, vacuum systems).
• Define alignment requirements for cavity string; verify positions during assembly and cooldown.
• Develop cleanroom and cold-mass assembly procedures, tooling, and fixtures.
• Support transport, cold testing, operation; feed data back into future designs; promote safety culture.
• Translate models/test data into ATLAS outputs and review before fabrication or testing.

Skills

Cryogenic hardware experience

Thermal analysis

Structural analysis

Modal analysis

Precision assembly & metrology

Clear design documentation

Education

Bachelor's degree in Mechanical Engineering

Master's degree preferred

Tools

ANSYS

COMSOL

CST

HFSS

Job description

Subcritical Systems is hiring for a role leading the mechanical design of SRF cryomodules, aligning superconducting cavities for high-precision beamlines. You will collaborate with SRF, cryogenic, RF, vacuum, and manufacturing teams to move designs from concept through assembly and cold testing in an in-person Austin setting.

You will apply thermal, structural, and metrology expertise to meet demanding heat-load budgets and alignment requirements, while feeding data into ATLAS to guide future