Aerospace Engineering Jobs in Tennessee (NOW HIRING)

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 35 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 Project Engineer – Facility Mod Manager 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 offercompetitive pay and benefits, and well-being programsto support you and your family.

The Mod Manager supports the Engineering Manager in leading technical, supervisory, and project activities related to centrifuge fabrication equipment and major facility expansion efforts. This role helps direct engineering work, oversees day‑to‑day team activities, and ensures the safe, compliant, and efficient development, installation, and modernization of critical fabrication systems. The Mod Manager plays a key role in integrating engineering work with construction, operations, safety, and project management teams throughout the expansion lifecycle.

Key Responsibilities:

• Assist the Engineering Manager in planning, organizing, and directing engineering activities focused on centrifuge fabrication equipment and facility expansion systems.
• Provide daily leadership, task coordination, and technical support to engineering staff.Oversee engineering development, modification, and installation of specialized fabrication equipment, production tooling, and supporting infrastructure.
• Ensure engineering activities comply with safety standards, regulatory requirements, nuclear material handling rules, and organizational policies.
• Support troubleshooting, system optimization, reliability improvements, and upgrades to fabrication equipment and associated facility systems.
• Collaborate closely with operations, maintenance, construction, procurement, safety engineering, and project management teams.
• Assist in developing project schedules, engineering cost estimates, technical specifications, and procurement packages for facility expansion activities.
• Participate in design reviews, hazard analyses, risk assessments, and system readiness evaluations.
• Review and approve engineering documentation including drawings, calculations, test procedures, and commissioning plans.
• Help monitor contractor and vendor performance, ensuring adherence to technical and quality requirements.
• Provide status updates and technical insights to senior leadership on equipment performance, project progress, and engineering risks.
• Ensure all engineering activities meet site security protocols and support Q‑clearance requirements.

Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, Nuclear Engineering, or Chemical Engineering.

Required Skills, Experience, and Qualifications

• 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 if required.
• Due to federal contract security requirements, this position requires U.S. Citizenship.
• Successful candidates will be able to perform the essential functions of the job with 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.
• 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.
• 8+ years of engineering experience in advanced equipment design, fabrication systems, or highly regulated environments.
• Experience supporting or leading engineering projects or small technical teams.
• Strong understanding of fabrication processes, rotating machinery, tooling systems, mechanical design, or production equipment.
• Ability to obtain and maintain a Q‑level security clearance.
• Strong communication, leadership, and analytical skills.

Preferred Qualifications and Location Details

• Active DOE Q Clearance.
• Master’s degree in Mechanical, Aerospace, Nuclear, or Chemical engineering discipline.
• Experience with centrifuge fabrication equipment, custom process equipment, or major facility expansions.
• Experience in DOE, NNSA, aerospace, nuclear, or similarly regulated engineering environments.
• Familiarity with engineering standards such as ASME, ANSI, or NQA‑1.
• Onsite position – Centrus Energy

As an L&A employee, you will be eligible for a competitive salary as well as a comprehensive benefits package including healthcare (medical and dental), 401K plan, and paid time off. We believe in investing in our employees beyond compensation and as an L&A employee, you will have access to in-house training, career pathing, mentoring award programs, tuition reimbursement and much more.

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