Relisted position. Originally listed on 3/12/2026. Previous candidates need not reapply. We have openings for a Heavy Equipment Mechanic. You will perform journey-level duties to repair and maintain a wide variety of mechanical/electrical plant support equipment such as engines, motors, pneumatics, hydraulic systems, air ventilation equipment, emergency generators, power gates, construction equipment, e.g. loaders, backhoes, aerial lifts, mobile cranes, and compressors. This position is in the Infrastructure Maintenance and Utilities Department and may require work at Site 300 in Tracy, California. This position requires full-time on-site presence due to the nature of the work. You will • Be responsible for site-wide operation and maintenance of a wide variety of mechanical and electrical equipment using standard tools of heavy equipment mechanic trade. • Repair and maintain air ventilation systems, power gates, hydraulics systems, stationary and portable generators, compressors, engines, and construction equipment. • Maintain good working knowledge of all plant and programmatic equipment in assigned work areas. • Perform tasks in accordance with ES&H regulations and procedures, fulfill all integrated safety, security, and property management responsibilities as appropriate. • Complete maintenance tasks and make decisions that involve techniques and procedures that are well defined. • Interact with supervisors, building coordinators, ES&H technicians, inspectors, and other craft personnel. • Prepare standard reports and complete safety forms, work orders, training, and timekeeping utilizing a computer and mobile devices. • Perform other duties as assigned. Qualifications • Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship. • High School Diploma, GED, or equivalent combination of education and/or experience. • Completion of apprentice training program and/or equivalent journey-level work experience as a heavy equipment mechanic. • Journey level, skills, knowledge, and abilities in the heavy equipment mechanic trade including knowledge of codes, laws and regulations including basic skills in the application of Safety policies and regulations. • Experience troubleshooting, repairing, and maintaining loaders, backhoes, aerial lifts, mobile cranes, stationary and portable generators, and compressors. • Experience with hydraulic and pneumatic systems and industrial ventilation (HVAC) maintenance and repair. • Demonstrated effective customer service, interpersonal, and communication skills necessary to interact effectively with personnel of all levels. • Demonstrated ability to effectively write reports and complete forms. Basic knowledge of computers and mobile devices for preparing reports, work orders and completing forms, training, and timekeeping. • Ability to work scheduled as well as emergency overtime work and weekends, travel to Site 300. • Valid California Driver's License and ability to obtain and maintain a Commercial Driver's License. Qualifications We Desire • Experience with modern predictive and preventive maintenance techniques. • Experience and knowledge of vibration analysis. Pay Range $45.82 - $55.70 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. 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). 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. Pre-Placement Medical Exam A job related pre-placement medical examination may be required. How to identify fake job advertisements Please be aware of recruitment scams where people or entities are misusing the name of Lawrence Livermore National Laboratory (LLNL) to post fake job advertisements. LLNL never extends an offer without a personal interview and will never charge a fee for joining our company. All current job openings are displayed on the Career Page under "Find Your Job" of our website. If you have encountered a job posting or have been approached with a job offer that you suspect may be fraudulent, we strongly recommend you do not respond. To learn more about recruitment scams: https://www.llnl.gov/sites/www/files/2023-05/LLNL-Job-Fraud-Statement-Updated-4.26.23.pdf Videos To Watch https://www.youtube.com/watch?v=ITnv867DReU