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Mechanical Engineer

Geosyntec Consultants
United States, Tennessee, Oak Ridge
Jun 02, 2026

Mechanical Engineer
Primary Location

US-TN-Oak Ridge
ID

2026-4513



Category
Mechanical Engineer

Position Type
Regular Full-Time

Remote
No



Overview

Longenecker & Associates (L&A), a Geosyntec Company, is a trusted partner enabling critical missions across the U.S. Department of Energy (DOE) complex for more than 30 years. We contribute to DOE's nuclear security and environmental remediation enterprise by providing the highest-caliber staff and experts. We are seeking a motivated Mechanical Engineer to contribute to our mission supporting our work at Centrus Energy in Oak Ridge, TN.

Geosyntec is an innovative, international engineering and consulting firm serving private and public-sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure. Our engineers, scientists, technical and project employees serve our clients from offices across the world. Ranked by ENR as one of the top environmental engineering design firms, Geosyntec is internationally known for its technical leadership, broad experience, and exceptional client service.

We invest in our people. Each employee is unique, and your career at Geosyntec will be too. We offer competitive pay and benefits, and well-being programs to support you and your family.

To Learn More Visit: http://www.geosyntec.com/careers/.



Essential Duties and Responsibilities

Reporting directly to the Engineering Manager, the Sr. Mechanical Engineer will be responsible for supporting scopes of work activities associated with components, assemblies, and machines in the Centrifuge Project. Provides support to the Centrifuge Program to accomplish goals and objectives while ensuring compliance to Centrus standards and practices.

    Assist in leading, designing, building, and troubleshooting the following;
    • Plant expansion activities;
    • Large scale heating and cooling systems;
    • High vacuum systems;
    • Helium leak detection equipment;
    • Composite parts and assemblies;
    • Machined parts and assemblies;
  • Assist in design and analysis of structural and dynamic systems;
  • Design manufacturing equipment as needed for manufacturing activities;
  • Develop specifications for fabrication materials and equipment;
  • Assist in the creation, review, and approval of engineering packages to be used for fabrication;
  • Establish procedures for assembly and repair of fabricated components;
  • Drive process improvement activities for internal activities and external suppliers;
  • Manage multiple priorities and ensure that deliverables are met within schedule and budget;
  • Adheres to company policies and procedures with regards to safety, code of conduct, security, and environmental program requirements; and
  • Contribute to cross functional teams including design, engineering, manufacturing, operations, testing, quality and purchasing.


Education and Licensure

  • Bachelor's Degree in Mechanical or Aerospace Engineering required.
  • Advanced degree in Mechanical or Aerospace Engineering preferred.


Skills, Experience and Qualifications

  • At least 3 years of working experience in a Nuclear and/or DOE environment; or equivalent combination of education and experience required.
  • 3+ years of CAD experience.
  • SolidWorks experience.
  • CREO experience.
  • FEA experience.
  • Due to federal contract security requirements, this position requires U.S. Citizenship.
  • Due to federal contract security requirements, candidates must be able to successfully pass a federal background investigation to secure and maintain DOE Q security clearance.
  • Successful candidates will be able to perform the essential functions of the job with or without reasonable accommodation. This job posting reflects management's assignment of essential functions and the descriptions listed do not restrict management's right to assign or reassign duties and responsibilities to this job at any time.
  • Health & Safety training, medical monitoring, and client-driven drug and background testing. (required)

Please note that marijuana remains a Schedule III controlled substance under Federal Law. Federal contractors must follow Federal drug-free workplace rules, which prohibit marijuana use, even if medical or recreational use is permitted under State Law.

PREFERRED QUALIFICATIONS & LOCATION DETAILS:

  • Project Management experience.
  • Experience with Centrifuge or HALEU projects.
  • Work will be performed at the Centrus facility in Oak Ridge, TN.
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