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Nnsa Contractor Jobs in Oak Ridge, TN (NOW HIRING)

Navarro Inc.

Mechanical Engineer (3915)

Oak Ridge, TN · Remote

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with ... Experience in DOE, NNSA, nuclear, advanced energy, chemical processing, metallurgy, or highly ...

Navarro Inc.

Mechanical Engineer (3915)

Oak Ridge, TN · On-site

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with ... DOE/NNSA, NASA, and the Department of Defense. Position Summary The Mechanical Engineer will ...

Navarro Inc.

Electrical Engineer (3915)

Oak Ridge, TN · On-site

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with ... DOE/NNSA, NASA, and the Department of Defense. Position Summary The Electrical Engineer will ...

Navarro Inc.

Mechanical Designer (3918)

Oak Ridge, TN · On-site +1

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with ... DOE/NNSA, NASA, and the Department of Defense. Position Summary The Mechanical Designer will ...

RSI EnTech, LLC

Senior Program Manager - Remote

Oak Ridge, TN · On-site +1

$110K - $111K/yr

Review and approve invoices from independent contractors and subcontractors, checking for accuracy ... Flexible location; preference for proximity to a DOE or NNSA site, including New Mexico, Oak Ridge ...

RSI EnTech, LLC

Senior Program Manager

Oak Ridge, TN · On-site

$120 - $180/hr

Review and approve invoices from independent contractors and subcontractors, checking for accuracy ... Flexible location; preference for proximity to a DOE or NNSA site, including New Mexico, Oak Ridge ...

New

Navarro Inc.

Mechanical Designer (3918)

Oak Ridge, TN · On-site

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with ... DOE/NNSA, NASA, and the Department of Defense. Position Summary The Mechanical Designer will ...

Navarro Inc.

Mechanical Designer (3918)

Oak Ridge, TN · Remote

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with ... DOE/NNSA, NASA, and the Department of Defense. Position Summary The Mechanical Designer will ...

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Nnsa Contractor information

What is an NNSA contractor?

NNSA contractors are private companies or organizations that work with the National Nuclear Security Administration (NNSA) to help manage, operate, and support its facilities and missions. These contractors provide expertise in areas such as nuclear security, nonproliferation, and science-based stockpile stewardship. They play a crucial role in ensuring the safety, security, and effectiveness of the U.S. nuclear weapons stockpile, often managing laboratories, plants, and sites under long-term agreements with the NNSA.

What are the key skills and qualifications needed to thrive as an NNSA contractor?

To thrive as an NNSA Contractor, you generally need a strong background in engineering, physical sciences, or cybersecurity, along with a relevant degree and often a security clearance. Familiarity with classified information systems, project management tools, and federal compliance standards is typically required. Excellent problem-solving, attention to detail, and strong collaboration skills help contractors navigate complex projects and communicate effectively with federal stakeholders. These skills and qualifications are crucial for ensuring national security objectives are met and compliance with strict government regulations is maintained.

What unique challenges might I encounter as an NNSA contractor, and how can I prepare for them?

As an NNSA contractor, you may face unique challenges such as navigating complex security protocols and adapting to evolving federal compliance requirements. The work often involves collaboration with multidisciplinary teams, including government officials, scientists, and engineers, which requires strong communication and adaptability. Additionally, balancing project deadlines with strict safety and confidentiality standards can be demanding. Preparing by familiarizing yourself with federal security regulations, honing project management skills, and developing a clear understanding of classified information handling will be highly beneficial.

What is the difference between Nnsa Contractor vs Nnsa Analyst?

AspectNnsa ContractorNnsa Analyst
CredentialsSecurity clearances, specialized certificationsSecurity clearances, technical certifications
Work EnvironmentProject-based, on-site or remoteOffice or field, analytical setting
Employer & Industry UsageContracting firms, government agenciesGovernment agencies, defense sector

While both Nnsa Contractors and Nnsa Analysts work within the intelligence community, Nnsa Contractors typically focus on executing specific projects for government agencies, often on a contractual basis. Nnsa Analysts primarily analyze intelligence data to support decision-making. Contractors may have more varied roles and project scopes, whereas Analysts focus on data interpretation and reporting.

What job categories do people searching Nnsa Contractor jobs in Oak Ridge, TN look for?

The top searched job categories for Nnsa Contractor jobs in Oak Ridge, TN are:

Nnsa Contractor jobs near you
Infographic showing various Nnsa Contractor job openings in Oak Ridge, TN as of August 2026, with employment types broken down into 87% Full Time, 8% Part Time, and 5% Contract. Highlights an 89% In-person, 6% Hybrid, and 5% Remote job distribution.

Mechanical Engineer (3915)

Navarro Inc.

Oak Ridge, TN • Remote

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 7 days ago

Job description

Navarro Research and Engineering is recruiting a Mechanical Engineer (3916) in Oak Ridge, TN. 

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with clients to advance clean energy and deliver effective solutions for complex challenges in the nuclear and environmental fields. Joining Navarro means being a part of an exceptional team committed to quality and safety while also looking for innovative strategies to create value for the client’s success. Headquartered in Oak Ridge, Tennessee, Navarro has active programs in place across the nation for DOE/NNSA, NASA, and the Department of Defense. 

Position Summary 

The Mechanical Engineer will support the design and development of custom high-temperature process equipment, including molten salt vessels, furnaces, and related thermal systems. This role will help translate process needs into manufacturable mechanical designs while coordinating with electrochemical, piping, electrical, controls, procurement, fabrication, and operations teams. 

Responsibilities 

  • Design and support high-temperature molten salt vessels, furnaces, thermal equipment, fixtures, and custom process equipment. 
  • Develop mechanical design inputs, calculations, equipment specifications, drawings, design review packages, and fabrication support documentation. 
  • Evaluate materials, thermal expansion, sealing, insulation, support structures, maintainability, fabrication methods, and equipment interfaces. 
  • Coordinate mechanical design requirements with electrochemical systems, mechanical piping, electrical power, controls, instrumentation, and manufacturing teams. 
  • Support vendor coordination, fabrication oversight, inspection, installation, commissioning, troubleshooting, and design change resolution. 
  • Ensure mechanical designs support safety, quality, manufacturability, operability, maintainability, and project schedule requirements. 

Requirements

Requirements 

  • Experience with high-temperature mechanical equipment, molten salt vessels, furnace design, thermal systems, or similar industrial process equipment. 
  • Demonstrated experience with custom equipment design and fabrication, including development of practical designs that can be built, inspected, installed, and maintained. 
  • Strong mechanical engineering knowledge related to materials, pressure/thermal effects, structural supports, equipment interfaces, and design documentation. 
  • Ability to work effectively with multidisciplinary technical teams in a safety- and quality-driven engineering environment. 
  • Experience supporting design reviews, calculations, specifications, drawings, procurement, fabrication, or field implementation activities. 

Preferred Qualifications 

  • Experience with molten salts, high-temperature corrosion considerations, refractory/insulation systems, or specialized furnace and vessel design. 
  • Experience in DOE, NNSA, nuclear, advanced energy, chemical processing, metallurgy, or highly regulated industrial environments. 
  • Professional Engineer registration, advanced mechanical design experience, or experience acting as a technical lead for custom equipment design is preferred. 

Education and Experience 

Bachelor’s degree in Mechanical Engineering or a related engineering discipline is preferred. Equivalent combinations of education, technical training, and directly relevant high-temperature equipment design experience may be considered. 

Due to the nature of the government contract requirements and/or clearances requirements, US citizenship is required. 

Navarro is an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, race, religion, color, national origin, age, disability, veteran’s status, or any classification protected by applicable state or local law.. 

EEO Employer/Vet/Disabled 

Benefits

  • Health Care Plan (Medical, Dental & Vision)
  • Retirement Plan (401k)
  • Life Insurance (Basic, Voluntary & AD&D)
  • Paid Time Off (Vacation & Public Holidays)
  • Short Term & Long Term Disability