Mechanical Engineer

gem-technologies· Engineering
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📍 Oak Ridge, TN (ORNL)FullTime

About this role

ABOUT THE ROLE

We are seeking a Mechanical Engineer to join our team supporting the Oak Ridge National Laboratory! This position is full-time and will be based out of Oak Ridge, Tennessee.

Responsibilities

  • Apply engineering expertise to support HFIR operations.

  • Prepare engineering designs for new installations and for replacement or upgrade of HFIR structures, systems, and components (SSCs).

  • Perform calculations and analyses to support design basis and requirements.

  • Apply relevant codes and standards, including ASTM, ASME Boiler and Pressure Vessel Code, ASME B31 piping codes, NQA-1, AWS, etc.

  • Support development of reactor core component replacement plans.

  • Prepare design specifications and define acceptance criteria for component upgrades.

  • Update material specifications and provide technical support for material procurement.

  • Implement modifications in accordance with RRD configuration control processes.

Requirements

  • Education & Years of Experience – Bachelor’s Degree in mechanical engineering, nuclear engineering, or related discipline and 10+ years in DOE nuclear facilities and/or commercial nuclear plants.

  • CitizenshipTo be considered, you must be a United States (U.S.) citizen due to the federal nature of the work.

  • Clearance – To be considered, you must be able to obtain and maintain a government issued clearance, if needed.

  • Proficiency in engineering design and manufacturing practices, including welding and joining techniques and machine design.

  • Familiarity with DOE Orders and Standards (e.g., DOE O 420.1C, DOE STD 1189, DOE STD-1073 2016).

  • Strong ability to read and interpret mechanical design drawings and apply GD&T principles (ASME Y14.5).

  • Experience with configuration management and engineering change control processes in a nuclear environment.

Desired Skills

  • Experience with AutoPIPE and finite element analysis is desirable.

About the Site

The DOE's Oak Ridge National Laboratory (ORNL), located in Oak Ridge, Tennessee, conducts research and development to create scientific knowledge and solutions that strengthen the nation's leadership in key areas of science; increase the availability of clean, abundant energy; restore and protect the environment; and contribute to national security. ORNL also performs isotope production, information management, and technical program management (energy.gov).

ABOUT GEM

GEM Technologies, Inc. (GEM) is an award-winning federal contractor with more than 30 years of experience providing environmental, construction, facility management, and technical services to federal agencies, state and local governments, and commercial organizations. Founded in 1994 as a nuclear engineering firm to support federal operations in East Tennessee, GEM has since expanded into a nationwide, multi-disciplinary provider with over 270 employees and a diverse portfolio of contracts in the environmental, nuclear, and defense sectors. Some reasons to join GEM are:

  • Our philosophy – We believe in the power of effective collaboration and recognize that good partnerships are the building blocks to success.

  • Our relationships – Partnering with federal clients, we solve complex problems, exceed expectations, and advance critical missions.

  • Our team – We are committed to managing a cohesive workforce and cultivating a supportive workplace for our employees on contracts and in-office.

  • Our community involvement – Supporting our communities, we invest time and money in local schools and non-profit organizations.

COMPENSATION AND BENEFITS

GEM’s offered compensation is dependent on candidates’ education, qualifications, and relevant years of experience. To recruit and retain our exceptional staff, we offer the opportunity to elect benefit packages that best suit our employee’s needs; this includes, but is not limited to, a competitive Salary, Medical, Dental and Vision Insurance (including HSA & PPO options), Paid Time Off (PTO), Paid Holidays, Life Insurance, and a matching 401(k) Retirement Plan.

Please Note: With the exception of mandated state requirements, GEM does not publish salary information on external job boards; as such, most ranges listed are estimates made by vendors and not actual salary ranges.

EQUAL OPPORTUNITY EMPLOYER

GEM Technologies, Inc. is an Equal Opportunity/Affirmative Action Employer and does not discriminate on the basis of race, gender, sexual orientation, gender identity/expression, national origin, disability, age, genetic information, veteran status, marital status, pregnancy or related condition, or any other basis protected by law.

Frequently Asked Questions

Is the salary disclosed for the Mechanical Engineer position at gem-technologies?
The salary for this Mechanical Engineer role at gem-technologies is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Mechanical Engineer position at gem-technologies located?
This Mechanical Engineer role at gem-technologies is based in Oak Ridge, TN (ORNL). The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Mechanical Engineer role at gem-technologies full-time or part-time?
This is listed as a FullTime position. It is posted as a Mechanical Engineer role in the Engineering department at gem-technologies.
Which team or department does the Mechanical Engineer at gem-technologies belong to?
This Mechanical Engineer position is part of the Engineering department at gem-technologies. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Mechanical Engineer position at gem-technologies?
Click the "Apply Now" button on this page. You will be redirected to gem-technologies's official application portal hosted on ashby where you can submit your application directly.
When was the Mechanical Engineer job at gem-technologies posted?
This Mechanical Engineer position at gem-technologies was posted on Feb 18, 2026. Apply as soon as possible — early applications are often reviewed first.
Mechanical Engineer
gem-technologies
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