LLNL

Nuclear Facility Senior Mechanical Project Engineer

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At a Glance

Location
Livermore, California, United States
Work Regime
onsite
Employment
Full-time
Posted
2026-03-17T18:11:29.827Z

Key Requirements

Required Skills

AutoCADSolidWorks

Domain Knowledge

  • Construction
  • Education
  • Energy
  • Engineering
  • Regulatory

Benefits & Perks

Health Insurance

Glassdoor! Flexible Benefits Package 401(k) Relocation Assistance Education

Requirements

Ability to secure and maintain a U.S. Department of Energy (DOE) Q-level security clearance, which requires U.S. citizenship.

Bachelor’s degree in mechanical engineering or relevant technical field, or the equivalent combination of education and related experience.

Experience with and advanced level knowledge in the design of facility-related mechanical systems and components such as ventilation systems and associated controls, fire protection systems, liquid nitrogen or argon systems, chilled water systems, or boiler systems.

Experience developing mechanical project scope, evaluating design options, determining design criteria, and in preparing and reviewing design and construction specifications, calculations, and drawings that support efficient and successful job completion in industrial facility environments.

Advanced level knowledge and demonstrated proficiency and experience using of applicable codes and industry standards, e.g., ASME, California Building Code, Uniform Building Code, ASHRAE.

Advanced verbal and written communication skills necessary to effectively interact and collaborate in a team environment, including the ability to prepare, present, and explain technical or operational information and to management, reviewers, and stakeholders.

Compensation & Benefits

#LI-Onsite

Position Information

This is a Career Indefinite position, open to Lab employees and external candidates.

Why Lawrence Livermore National Laboratory?

Included in 2026 Best Places to Work by Glassdoor!

Flexible

Responsibilities

We are seeking a

Nuclear Facility Senior Mechanical Project Engineer

to provide engineering design solutions for new construction, upgrades to facility mechanical systems (i.e., ventilation, fire suppression, compressed gas, chillers, boilers), and modifications to conventional office and laboratory facilities. You will apply advanced technical knowledge in mechanical engineering to develop conceptual ideas into workable and cost-effective solutions that maintain facilities supporting research and investigations of nuclear materials. You will participate in new and ongoing projects with technical responsibilities including design, development, fabrication, integration, testing and fielding of facility projects and upgrades. You will apply advanced technical knowledge in mechanical engineering to develop conceptual ideas into workable and cost-effective solutions that maintain facilities, supporting research and investigations of nuclear materials. This position will report programmatically to the Facility Projects Manager in the Superblock. This position is in the Defense Technologies Engineering Division (DTED) within the Engineering Directorate.

This position requires full-time on-site presence due to the nature of the work.

This position will be filled at either level based on knowledge and related experience as assessed by the hiring team. Additional job responsibilities (outlined below) will be assigned if hired at the higher level.

You will

About the Company

Join us and make YOUR mark on the World!

Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability.

Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact.