Maintenance Mechanic (Owl Shift

Maintenance Mechanic (Owl Shift)

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.

We have an opening for a Maintenance Mechanic. You will operate and maintain a wide variety of mechanical and electrical equipment, such as pumps, valves, and flow controls associated with the heating, air conditioning, water supply, sewage treatment, and related operating systems and utilities of LLNL's plant and research facilities. This position is in the Mechanical Utilities Division within the Infrastructure Maintenance and Utilities Department, and may require work at Site 300 in Tracy, CA.

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

You will:

• Operate and maintain a wide variety of site-wide mechanical and electrical equipment using materials, power tools, and hand tools applicable to the trade.
• Work from drawings and verbal/written instructions to keep plant and research systems operating.
• Maintain and operate equipment in conjunction with underground utilities distribution systems, which include natural gas systems, centralized compressed air system, sewer collection system, and water (city, low conductivity, and demineralized).
• Maintain, operate, and repair water pumps, vacuum pumps, LN2 dewars, air compressors, valves, and other plant equipment.
• Operate specialized mechanical systems and devices (e.g., operate high-pressure steam boiler), take corrective measures in the event of malfunctions within specified time according to State codes.
• Prepare standard reports, permit requirements, deficiency forms, and preventive maintenance work requests utilizing written or computer format.
• Interact with co-workers, supervisors, engineers, and skilled technical personnel.
• Perform other duties as assigned

• Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship.
• High school diploma or apprentice training completion or equivalent combination of education and related work experience.
• Basic skills, knowledge, and abilities in maintenance mechanic tasks including journey-level machine shop experience.
• Basic knowledge and experience operating and maintaining a wide variety of mechanical and electrical equipment such as pumps, valves, and flow controls associated with heating, air conditioners, water supply, sewage treatment, and related operating systems and utilities.
• Experience using hand tools and power tools of the trade such as grinders, torque wrenches, micrometers, pneumatic tools, presses, and shears. Working knowledge of related trades such as HVAC, plumbing, electrical, and millwright.
• Basic skills in the application of applicable safety policies and procedures.
• Basic written and computer skills necessary to complete work orders, time reporting and training.
• Effective customer service and communication skills to interact with personnel at all levels and across multidisciplinary teams.
• Valid California driver's license, and the ability to obtain and maintain multiple certifications and licenses such as California State Certificate Backflow Tester and/or State of California Water Distribution Operator License.
• Ability to work scheduled shift (day, swing, owl), emergency overtime, and various shifts including weekends; ability to travel to Site 300; and ability to become medically qualified to wear respiratory and protection equipment.

Pay Range $43.60 - $52.99 hourly

This position is under a Collective Bargaining Agreement and step structure. Step placement will be determined after your qualifications are fully assessed during the interview process.

#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 Benefits Package 401(k) Relocation Assistance

Education Reimbursement Program Flexible schedules (
* depending on project needs) Our values - visit https://(Use the "Apply for this Job" box below).-values

Site 300 Site 300 is an experimental test site operated by LLNL. Situated on 7,000 acres in rural foothills approximately six miles southwest of downtown Tracy and 15 miles southeast of Livermore, Site 300 hosts approximately 200 employees with expertise in such fields as engineering, chemistry, biology, and environmental restoration. Employees assigned to work at Site 300 may be exposed to the organism that causes San Joaquin Valley Fever (coccidioidomycosis).

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