Senior Mechanical Engineer-Gas Separation & High-Vacuum

Laser Isotope Separation Technologies (LIS Technologies Inc.); Oak Ridge (TN); On-site; USD 135,000 - 165,000; Full time

Benefits offered by this job

Relocation assistance

Medical, dental, vision insurance

401(k) and life insurance

Paid time off and holidays

Job summary

LIS Technologies Inc. in Oak Ridge, TN is seeking a Mechanical Engineering Specialist to design and integrate gas separation and supersonic flow systems.

You will develop CAD models, perform CFD analyses, and lead fabrication from prototype to production in collaboration with laser, process, and manufacturing teams. The role requires learning quickly, strong documentation, and the ability to coordinate with cross-functional teams in a high-precision environment.

Qualifications

• B.S. in Mechanical Engineering, Aerospace Engineering, or a related field.
• 10+ years of mechanical design and engineering experience, ideally with high-vacuum or gas-dynamic systems.
• Advanced proficiency in SolidWorks, Inventor, or equivalent 3D CAD software.
• Experience with machined components, GD&T, and design for manufacturing.
• Hands-on experience designing, building, and integrating complete assemblies.
• Excellent written communication and technical documentation skills.

Responsibilities

• Design and develop gas separation assemblies and flow manifolds for isotope enrichment systems.
• Integrate custom designs and commercial equipment into complete, functional systems.
• Create and maintain detailed 3D CAD models and manufacturing drawings.
• Specify materials, tolerances, and sealing solutions for high-vacuum and corrosive environments.
• Coordinate with vendors on machining and precision component assembly.
• Lead design reviews, prototype builds, and iterations with cross-functional teams.
• Support experimental test setups, assembly, and mechanical integration in laboratory environments.
• Prepare engineering reports, specifications, and presentations for internal and external stakeholders.

Skills

Mechanical design

3D CAD proficiency

CFD analysis

Documentation

Education

B.S. in Mechanical Engineering

Tools

SolidWorks

Inventor

Job description

LIS Technologies Inc. in Oak Ridge, TN is seeking a Mechanical Engineering Specialist to design and integrate gas separation and supersonic flow systems.

You will develop CAD models, perform CFD analyses, and lead fabrication from prototype to production in collaboration with laser, process, and manufacturing teams. The role requires learning quickly, strong documentation, and the ability to coordinate with cross-functional teams in a high-precision environment.