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Thermal Mechanical Engineer

Oak Ridge National Laboratory
life insurance, parental leave, 401(k), retirement plan, relocation assistance
United States, Tennessee, Oak Ridge
1 Bethel Valley Road (Show on map)
Feb 20, 2026

Requisition Id16012

Overview:

We are seeking a Thermal Mechanical Engineer who will focus on conceptualization, design, build, and deployment of Electromagnetic Isotope Separation (EMIS) devices through the creation of sophisticated 3D CAD models and detailed design packages suitable for fabrication. This position resides in the Plasma Enrichment Deployment & Engineering Group in the Plasma Enrichment Science & Engineering Section, Enrichment Science & Engineering Division, Isotope Science & Engineering Directorate, at Oak Ridge National Laboratory (ORNL).

ESED is the national steward for the research, development, and demonstration of enrichment technologies. ORNL is a recognized leader in centrifuge and electromagnetic enrichment technology. We are the stewards and dispensary of the nation's stable isotope inventory and have a legacy dating to the late 1940s. This division integrates the full enrichment process from chemical synthesis of feed materials through fabrication of the custom physical forms needed to support the user communities.

As part of our team, you will work closely with a focused group of scientists, technicians, and engineers on challenging, fast paced technical projects in support of the DOE Isotope Program. This has been a quickly expanding program at ORNL and offers significant opportunities for professional growth. The team demonstrates a collective excitement for the important work being accomplished and values creative solutions to developing technology and processes solving the latest challenges. Successful development and deployment of isotope separation technologies requires an acute attention to design detail and continued consideration of personnel and equipment safety.

Major Duties/Responsibilities:

  • Conceptualize, design, develop and improve plasma-based enrichment technology related components using 3D Computer Aided Design (CAD) software (SolidWorks).
  • Create 2D drawings to be used for fabrication and communicate with staff and suppliers through the fabrication and assembly process.
  • Produce and analyze thermal models using SolidWorks and ANSYS or similar tools.
  • Produce and maintain As-Built documentation for complex systems to maintain configuration control.
  • Ensures drawings and designs are in full compliance with applicable engineering codes as well as environmental, safety, health, and quality program requirements.
  • Direct and participate in the installation, testing and development of designed systems, equipment, and components in collaboration with team members.
  • Coordinate internal and external design reviews as well as facilitate tracking and closeout of actions taken during these reviews.
  • Deliver ORNL's mission by aligning behaviors, priorities, and interactions with our core values of Impact, Integrity, Teamwork, Safety, and Service.

Basic Qualifications:

  • BS/BA degree in an engineering or related discipline with 5 years of relevant experience. An equivalent combination of education and experience may be considered.
  • Relevant experience collaborating with other designers, engineers, and scientists in the creation of 3D components, assemblies and prints from ideas, rough sketches, red lines, and notes, as this will be a regular function of the position.
  • Experience using SolidWorks 3D CAD design software.
  • Education and/or experience conducting thermal analysis of mechanical systems using ANSYS, COMSOL, or similar modeling software.
  • Proven track record of design for Safety, design for Manufacturing and Assembly, and basic knowledge of industry best practices, tools, and technologies.
  • Ability to work and communicate effectively with diverse teams of engineers, scientists, and technicians.
  • The ability to obtain and maintain a security clearance from the Department of Energy, which requires US Citizenship.

Preferred Qualifications:

  • Experience with CAD management using a PDM environment (such as SolidWorks Vault) is preferred.
  • Familiarity with machining and fabrication processes required for complicated and technically challenging components of diverse routine materials and specialty materials such as ceramics, graphite, and refractory metals.
  • Knowledge of conduction, convection, radiation, heat exchangers, and cooling system design.
  • Experience with Finite Element Analysis (FEA) tools is highly valued.
  • Knowledge of welding processes is a plus.
  • Fundamental knowledge of Geometric Dimensioning and Tolerancing (GD&T ASME Y14.5).
  • Enthusiasm for working in a fast-paced team environment.
  • Experience in the design, development, and installation of electromagnetic isotope separation related technologies including high vacuum, high voltage up to 75 kVDC, electromagnets, Radio Frequency power, specialty materials.
  • Excellent written and oral communication skills.
  • Motivated self-starter with the ability to work independently and to participate creatively in collaborative teams across the laboratory.
  • Ability to function well in a fast-paced research environment, set priorities to accomplish multiple tasks within deadlines, and adapt to ever changing needs.

Special Requirements:

  • Q clearance:This position requires the ability to obtain and maintain a clearance from the Department of Energy. As such, this position is a Workplace Substance Abuse (WSAP) testing designated position. WSAP positions require passing a pre-placement drug test and participation in an ongoing random drug testing program.

About ORNL:

As a U.S. Department of Energy (DOE) Office of Science national laboratory, ORNL has an impressive 80-year legacy of addressing the nation's most pressing challenges. Our team is made up of over 7,000 dedicated and innovative individuals! Our goal is to create an environment where a variety of perspectives and backgrounds are valued, ensuring ORNL is known as a top choice for employment. These principles are essential for supporting our broader mission to drive scientific breakthroughs and translate them into solutions for energy, environmental, and security challenges facing the nation.

ORNL offers competitive pay and benefits programs to attract and retain individuals who demonstrate exceptional work behaviors. The laboratory provides a range of employee benefits, including medical and retirement plans and flexible work hours, to support the well-being of you and your family. Employee amenities such as on-site fitness, banking, and cafeteria facilities are also available for added convenience.

Other benefits include the following: Prescription Drug Plan, Dental Plan, Vision Plan, 401(k) Retirement Plan, Contributory Pension Plan, Life Insurance, Disability Benefits, Generous Vacation and Holidays, Parental Leave, Legal Insurance with Identity Theft Protection, Employee Assistance Plan, Flexible Spending Accounts, Health Savings Accounts, Wellness Programs, Educational Assistance, Relocation Assistance, and Employee Discounts.

If you have difficulty using the online application system or need an accommodation to apply due to a disability, please email: ORNLRecruiting@ornl.gov.

Relocation:Moving can be overwhelming and expensive. UT-Battelle offers a generous relocation package to ease the transition process. Domestic and international relocation assistance is available for certain positions. If invited to interview, be sure to ask your Recruiter (Talent Acquisition Partner) for details.

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This position will remain open for a minimum of 5 days after which it will close when a qualified candidate is identified and/or hired.

We accept Word (.doc, .docx), Adobe (unsecured .pdf), Rich Text Format (.rtf), and HTML (.htm, .html) up to 5MB in size. Resumes from third party vendors will not be accepted; these resumes will be deleted and the candidates submitted will not be considered for employment.

ORNL is an equal opportunity employer. All qualified applicants, including individuals with disabilities and protected veterans, are encouraged to apply. UT-Battelle is an E-Verify employer.

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