Boiler & Pressure System Mechanic II

About the role

We have multiple openings for a Boiler & Pressure Systems Mechanic II. You will install, operate, maintain, and repair a combination of packaged boilers and pressure systems associated with building heating HVAC (heating hot water and low-pressure steam), process steam, related operating systems, and utilities of LLNL plant and research facilities. You will work independently and interact as a member of a multi-disciplinary team.

This position is in the Infrastructure Maintenance and Utilities Department. This position requires full-time on-site presence due to the nature of the work.

You will Perform journey-level boiler technician work including troubleshooting, installation, operations/operator, and maintenance and repair of hot water boilers, low-pressure steam boilers, thermal fluid systems, medium pressure steam generating equipment (including ASME Section l steam boilers), Low NOx burners, and related systems and components; to include combustion tuning, Burner Management System programming, and steam boiler water treatment testing.

Install, operate, maintain, and repair a wide variety of mechanical and electrical equipment using materials, power tools, hand tools, and specialty tools applicable to the trade. Provide effective customer service and communication necessary to interact effectively with a multi-disciplinary team, including peers, supervisors, customers, ES&H (Environmental, Safety, and Health) technicians, and other crafts personnel.

Analyze complex data and prepare logs (boiler and water treatment), standard reports, permit requirements, deficiency forms, and preventive maintenance work requests. Use a computer and hand-held electronic device for completing daily work orders, time reporting and web-based training. Work scheduled and emergency overtime. Perform all assignments in accordance with ES&H, security, and business practice requirements and policies.

Perform other duties as assigned.

Pay and benefits

Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship. High School Diploma, GED or equivalent. Completion of an apprenticeship training program and/or significant equivalent journey- to advanced- level experience working with a combination of commercial packaged hot water and steam boilers as well as low and high-pressure steam systems.

Intermediate to advanced skills, knowledge, and experience related to troubleshooting, operating and maintaining steam boilers, hot water boilers, thermal fluid heaters, and related systems, (e.g. expansion tanks, pumps, valves, water treatment, PLC based burner management systems, and electrical components) including basic electrical knowledge for AC circuits and DC circuits.

Experience using hand tools, power tools and instruments of the trade such as Combustion Analyzer, Manometer, electrical metering, and circuit testing equipment, as well as experience using water treatment testing equipment.

Demonstrated effective interpersonal, verbal, and written communication skills necessary to interact with a multidisciplinary workforce and customer base and customer service skills and ability to work independently as well as in a cross-functional team. Ability to become medically qualified to wear respiratory and other protective equipment and perform moderate work while wearing full-face or half-mask respirators.

Experience applying and following state and federal safety regulations and demonstrated ability to obtain and maintain required training and certifications including Competent Worker or equivalent qualifications. Demonstrated basic computer skills with hand-held electronic devices necessary to complete work orders, time reporting, and web-based training.

Valid California driver's license and ability to work scheduled, on-call, and emergency overtime. Pay Range $50.47 - $61.34 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.

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 2026 Best Places to Work by Glassdoor!

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).

Security Clearance This position requires a Department of Energy (DOE) Q-level clearance. If you are selected, we will initiate a Federal background investigation to determine if you meet 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.

Davis Bacon Act The Laboratory performs a variety of work, including some that may fall under Davis Bacon Act requirements. When work scope falls under this Act, the Laboratory complies with the prevailing wage requirements. 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 use and/or possession of mobile devices in Limited Areas.

Depending on your job duties, you may be required to work in a Limited Area where you are not permitted to have a personal and/or laboratory mobile device in your possession. This includes, but not limited to cell phones, tablets, fitness devices, wireless headphones, and other Bluetooth/wireless enabled devices.

If you use a medical device, which pairs with a mobile device, you must still follow the rules concerning the mobile device in individual sections within Limited Areas. Sensitive Compartmented Information Facilities require separate 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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