Principal Cryo Vacuum Systems Mechanical Designer

Quantinuum; Broomfield (CO); On-site; USD 140,000 - 190,000; Full time

Job summary

Quantinuum in Broomfield, CO is seeking a Principal Mechanical Design Engineer for Cryo Vacuum Systems. You will lead mechanical design for cryogenic, UHV environments and precision optics in a trapped-ion quantum computing platform.

The role requires hands-on design with 7+ years of experience, strong CAD/engineering analysis, and collaboration with scientists and engineers to de-risk complex hardware. A US-based candidate is expected.

Qualifications

• Bachelor’s degree in a technical field is required.
• Advance degrees preferred for higher responsibility and leadership.

Responsibilities

• Design mechanical hardware for cryogenic and UHV trapped‑ion quantum computing systems.
• Support ion-trap package and cryogenic assemblies, vacuum structures, thermal interfaces, optical alignment features, and precision mounting hardware.
• Develop designs managing parasitic heat loads, thermal contraction, CTE mismatch, stability, vibration, vacuum compatibility, and assembly tolerances.
• Design prototype hardware and de-risk test fixtures for lab validation of materials, interfaces, and subsystems.
• Support test planning for materials, adhesives, interfaces, coatings, cryogenic assemblies, and vacuum components.
• Collaborate with lab engineers to evaluate outgassing, cryogenic performance, stability, alignment repeatability, and failure modes.
• Perform mechanical, thermal, and tolerance analyses to guide decisions.
• Generate CAD models, drawings, assemblies, interface definitions, and design docs.
• Partner with vacuum, cryogenic, optical, electrical, trap fabrication, and systems teams to mitigate interface risks.
• Communicate design trades, risks, test results, and recommendations to teams and leadership.

Skills

3D CAD

Mechanical design

Tolerance analysis

FEA

Thermal modeling

UHV vacuum systems

Cryogenic systems

AMO physics

Trapped-ion hardware

Vacuum compatibility

GD&T

Design-for-assembly

Vendor management

Test fixtures

Materials selection

Thermal management

Education

Bachelor’s degree minimum

Advanced degree preferred (Mechanical/Aerospace/Applied Physics/Materials Science)

Tools

CAD software suites

FEA software

Job description

Quantinuum in Broomfield, CO is seeking a Principal Mechanical Design Engineer for Cryo Vacuum Systems. You will lead mechanical design for cryogenic, UHV environments and precision optics in a trapped-ion quantum computing platform.

The role requires hands-on design with 7+ years of experience, strong CAD/engineering analysis, and collaboration with scientists and engineers to de-risk complex hardware. A US-based candidate is expected.