Nuclear Facility Project Mechanical Engineer

Lawrence Livermore National Laboratory; Livermore (CA); On-site; USD 148,000 - 189,000; Full time

Job summary

Join an innovative laboratory dedicated to enhancing national security as a Nuclear Facility Project Mechanical Engineer. This role offers the opportunity to work on cutting-edge mechanical systems that support research into nuclear materials. You will apply your advanced engineering skills to design and implement solutions for complex mechanical systems, ensuring safety and efficiency in facility operations. Collaborate with some of the brightest minds in the field while contributing to projects that have a significant impact on national security. If you are passionate about engineering and want to make a difference, this is the perfect opportunity for you.

Benefits

Flexible schedules

Career development opportunities

Health and wellness programs

Retirement savings plans

Qualifications

• Ability to secure and maintain a U.S. DOE Q-level security clearance.
• Significant experience in designing facility-related mechanical systems.
• Advanced communication skills for effective team collaboration.

Responsibilities

• Prepare and implement complex mechanical designs for facility systems.
• Provide engineering support during construction and review submittals.
• Lead internal mechanical system projects and ensure compliance.

Skills

Mechanical Engineering

Design for Mechanical Systems

Project Management

Communication Skills

Education

Bachelor’s Degree in Mechanical Engineering

Tools

AutoCAD

Microsoft Word

Microsoft Excel

Microsoft PowerPoint

Job description

Nuclear Facility Project Mechanical Engineer

Mid-Senior Level | Full-time
Engineering | livermore, CA | 05/07/2025
Reference #: REF6942A
Job Code: TSS.3 Technical Services & Ops MTS 3 / TSS.4 Technical Services & Ops MTS 4
Organization: Strategic Deterrence
Position Type: Career Indefinite
Security Clearance: Anticipated DOE Q clearance (requires U.S. citizenship and a federal background investigation)
Drug Test: Required for external applicant(s) selected for this position (includes testing for use of marijuana)
Medical Exam: Not applicable Apply Now

Join us and make YOUR mark on the World!

Are you interested in joining some of the brightest talent in the world to strengthen the United States’ security? Come join Lawrence Livermore National Laboratory (LLNL) where our employees apply their expertise to create solutions for BIG ideas that make our world a better place.

We are dedicated to fostering a culture that values individuals, talents, partnerships, ideas, experiences, and different perspectives, recognizing their importance to the continued success of the Laboratory’s mission.

Pay Range

$148,920 - $188,880 Annually for the TSS.3 level
$178,770 - $226,668 Annually for the TSS.4 level

This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting. An employee’s position within the salary range will be based on several factors including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, seniority, geographic location, performance, and business or organizational needs.

Job Description

We have an opening for a Nuclear Facility Project Mechanical Engineer to provide engineering support for new construction, upgrades to facility mechanical systems (i.e., ventilation, fire suppression, compressed gas, piping, and pipe supports), design review, 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. This position is in the Strategic Deterrence Directorate.

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

This position will be filled at eitherlevel 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

• Prepare and implement complex mechanical designs utilizing design criteria, calculations, schematics, sketches, construction documents, procedures, and specifications.
• Utilize advanced technical engineering skills to develop detailed designs, drawings, calculations, bills of materials, presentations, and work planning documentation to support facility improvement projects including evaluating system capacities, planning sequencing of work, and ensuring construct-ability.
• Determine functional mechanical requirements for new or modified specialized equipment and support systems and perform advanced mechanical engineering calculations for ventilation, fire protection, cryogenic or gas systems, chillers, or boilers as needed.
• Provide engineering support during construction performed by outside contractors including reviewing submittals and shop drawings, responding to contractor questions, evaluating change order requests, or resolving field problems.
• Lead complex internal mechanical system projects with responsibility for the development and compliance with technical criteria, schedules, and deliverables, and direct the work of mechanical designers and drafters preparing drawings prepared in AutoCAD for projects.
• Participate in design reviews to obtain approvals of project scope and designs.
• Provide technical input to others on complex design requirements and identify and evaluate potential system impacts for projects affecting facility systems while complying with LLNL procedures, work control system processes, and DOE requirements.
• Perform other duties as assigned.

Additional job responsibilities, at the TSS.4 level

• Lead highly complex internal multi-disciplinary engineering projects as the Project Lead or Design Manager with overall responsibility for developing technical criteria, budgets, schedules, and deliverables.

Qualifications

• Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship.
• Bachelor’s Degree in Mechanical Engineering or equivalent combination of education and related technical experience.
• Significant experience and advanced knowledge in the design for 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.
• Significant experience developing mechanical project scope, evaluating design options, determining design criteria, and preparing and reviewing design and construction specifications, calculations, and drawings that support efficient and successful job completion in industrial facility environments.
• Knowledge and use of applicable codes and industry standards – i.e., ASME, California Building Code, Uniform Building Code, ASHRAE.
• Significant experience generating correspondence, reports, calculations, and presentations using Microsoft Word, Excel, PowerPoint, and other applicable software.
• Advanced verbal and written communication skills necessary to effectively interact and collaborate in a team environment and present and explain technical or operational information and provide advice to management, reviewers, and stakeholders.
• Ability and flexibility to reprioritize and change programmatic direction depending on emergent requests.

Additional qualifications at the TSS.4 level

• Substantial experience and subject matter expertise in facility mechanical engineering and industry code compliance.
• Expert communication, facilitation, and collaboration skills necessary to effectively present, explain, and advise senior management, reviewers, and stakeholders.

Qualifications We Desire

• Professional Engineering Registration in Mechanical Engineering in California or reciprocity from another state within twelve months.
• Significant experience performing design work for mechanical systems in an architectural engineering (AE) consulting environment.
• Significant experience with systems and infrastructure for ventilation systems and the ability to read and develop control system schematics.

Additional Information

#LI-Onsite

Position Information

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

Why Lawrence Livermore National Laboratory?

• Included in 2025 Best Places to Work by Glassdoor!
• Flexible schedules (*depending on project needs)

This position requires a Department of Energy (DOE) Q-level clearance. If you are selected, wewill initiate a Federal background investigation to determine if youmeet eligibility requirements for access to classified information or matter. Also, all L or Q cleared employees are subject to random drug testing. Q-level clearance requires U.S. citizenship.

Pre-Employment Drug Test

External applicant(s) selected for this position must pass a post-offer, pre-employment drug test. This includes testing for use of marijuana as Federal Law applies to us as a Federal Contractor.

Wireless and Medical Devices

Per the Department of Energy (DOE), Lawrence Livermore National Laboratory must meet certain restrictions with the useand/or possession ofmobile devices in Limited Areas. Depending on your job duties, you may be required to work in a Limited Area whereyou are not permitted to have a personal and/or laboratory mobile devicein your possession. This includes, but not limited to cell phones, tablets, fitness devices, wireless headphones, and other Bluetooth/wireless enabled devices.

Ifyou useamedical device, whichpairs with a mobile device,you must still follow the rules concerningthe mobile device in individual sections within Limited Areas. Sensitive Compartmented Information Facilities requireseparate approval. Hearing aids without wireless capabilities or wireless that has been disabled are allowed in Limited Areas, Secure Space and Transit/Buffer Space within buildings.

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