Maintenance Mechanic

Mid-Senior Level | Full-time
Craft and Skilled Trades | Livermore, CA | 08/05/2026
Reference #: REF
8646K
Job Code: 862.1 Maintenance Mechanic
Organization: Infrastructure and Operations
Position Type: Flexible Term
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: A job related pre-placement medical examination may be required

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.

Wehavemultiple openings for Maintenance Mechanics. You willoperateand 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 andmaintaina 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 systemsoperating.
• Maintain andoperateequipment 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 requestsutilizingwritten or computer format.
• Interact with co-workers, supervisors, engineers, and skilled technical personnel.
• Perform other duties as assigned.

• Ability to secure andmaintaina 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 experienceoperatingand 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, timereportingand training.
• Effective customer service and communication skills to interact with personnel at all levels andacrossmultidisciplinaryteams.
• Valid California driver’s license, and the ability to obtain andmaintainmultiple 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…