Principal Mechanical Engineer

CT19; Oak Ridge (TN); On-site; USD 150,000 - 230,000; Full time

Job summary

CT19 in Oak Ridge, TN is seeking a Principal Mechanical Engineering Specialist to lead the mechanical design, scale-up and industrialisation of specialised vacuum and process equipment. This hands-on technical leadership role moves complex hardware from prototype through detailed design, fabrication, integration, testing and production-ready release.

You will own the mechanical execution across the full hardware lifecycle, collaborating with multidisciplinary teams, machine shops, and external

Qualifications

• Advanced degree in Mechanical Engineering or related field.
• 15–20+ years in mechanical engineering with complex industrial equipment.
• Hands-on design, fabrication, integration, testing, and production release.
• Strong CAD, tolerancing and engineering documentation.
• Experience with vacuum, gas-handling or precision assemblies is a plus.

Responsibilities

• Lead mechanical design and scale-up of vacuum and process systems.
• Own 3D CAD assemblies, drawings, GD&T, BOMs and release packages.
• Drive design for manufacture, assembly, serviceability and cost effectiveness.
• Coordinate with suppliers, fabricators and machine shops.
• Produce robust technical documentation and design reviews.
• Oversee prototype build, testing, and production readiness.

Skills

3D CAD

Prototype to production

Cross-functional leadership

Engineering documentation

Vibration/structural analysis

Education

Advanced degree in Mechanical Engineering

Tools

GD&T

FEA

CNC machining

Additive manufacturing

Job description

Principal Mechanical Engineering Specialist - Advanced Industrial Technology

We are seeking an experienced Principal Mechanical Engineering Specialist to lead the mechanical design, scale-up and industrialisation of highly specialised vacuum and process equipment within an advanced technology environment.

This is a hands-on technical leadership role for an engineer who enjoys taking complex hardware from early-stage prototypes through detailed design, fabrication, integration, testing and production-ready release.

The role

You will own mechanical execution across the full hardware lifecycle - from concept development and 3D CAD through vendor fabrication, assembly, testing, design iteration and industrialisation.

You will work closely with multidisciplinary engineering teams, operations, machine shops, specialist fabricators and external contractors to deliver hardware that meets demanding requirements for performance, quality, safety, reliability, manufacturability and schedule.

Key responsibilities

• Lead mechanical design and scale-up of specialised vacuum and process systems.
• Translate laboratory and prototype concepts into reliable, manufacturable industrial equipment.
• Own complex 3D CAD assemblies, production drawings, GD&T, tolerances, interfaces, BOMs and engineering release packages.
• Drive design for manufacture, assembly, alignment, serviceability, maintainability and cost-effective production.
• Apply engineering calculations and, where appropriate, FEA to assess structural integrity, thermal effects, vibration, loading, deflection and mechanical stability.
• Select and develop materials, seals and mechanical interfaces for demanding process and vacuum environments.
• Lead prototype build, testing, troubleshooting and iterative design improvement through to production-ready configurations.
• Oversee assembly, fit-up, alignment, integration, leak testing and mechanical acceptance testing.
• Work directly with fabrication suppliers and contractors, including reviewing shop drawings and resolving manufacturability and quality issues.
• Interface closely with machine shops and precision fabrication teams. Experience with CNC machining, welding, precision fabrication, 3D printing and additive manufacturing is highly desirable.
• Coordinate mechanical interfaces with vacuum, gas-handling, instrumentation, structural and facility systems.
• Produce and maintain robust engineering documentation, including specifications, drawings, design reports, test records and change documentation.
• Lead design reviews, technical work packages and issue resolution while maintaining strong focus on quality, safety and regulatory requirements.

What we're looking for

• Advanced degree in Mechanical Engineering or a related discipline.
• 15–20+ years of mechanical engineering experience, ideally involving complex industrial, vacuum, gas-handling, process or other highly engineered equipment.
• Extensive hands-on experience with 3D CAD, mechanical system development, fabrication, assembly and prototype-to-production transition.
• Strong understanding of precision mechanical design, tolerancing, manufacturing processes and engineering documentation.
• Demonstrated ability to take ownership of complex hardware from concept through to operational deployment.
• Experience working effectively with multidisciplinary engineering teams, suppliers, fabricators and machine shops.

Highly desirable:

• Experience in the nuclear or other highly regulated engineering sectors.
• Experience with vacuum systems and demanding process environments.
• Experience with FEA and mechanical/structural engineering calculations.
• Knowledge of materials compatibility, sealing, leak integrity and contamination/cleanliness requirements.
• Experience industrialising novel or first-of-a-kind equipment.