Lead Diesel Mechanic

Diamond Concrete Supply

Lakeside, CA

Pay: $40-$43/hr

Shift: Full time

Company: Diamond Concrete Supply, Inc.

Pay: $40.00–$43.00 per hour

Job Type: Full-Time Work Location: In Person – Lakeside, CA 92040

**About Us**

Diamond Concrete Supply, Inc. is an established ready-mix concrete company with a busy fleet and a hands-on maintenance team. We take pride in keeping our trucks and equipment safe, reliable, and ready for work.

We are seeking an experienced, dependable, and skilled \*\*Lead Diesel Mechanic\*\* to join our Mechanics Team. The ideal candidate has strong mechanical and diagnostic skills, takes pride in quality workmanship, and can independently troubleshoot, maintain, and repair heavy-duty diesel trucks and equipment while helping coordinate daily maintenance operations.

**Key Responsibilities**

• Diagnose, maintain, and repair heavy-duty diesel mixer trucks, tractors, loaders, forklifts, and other company equipment.

• Troubleshoot and repair diesel engines, transmissions, brakes, steering, suspension, electrical and electronic systems, hydraulics, cooling systems, fuel systems, air conditioning, and emissions/aftertreatment systems.

• Use computerized diagnostic equipment to identify faults, determine root causes, and perform appropriate repairs.

• Perform scheduled preventative maintenance, routine inspections, major repairs, and component overhauls as needed.

• Inspect equipment for mechanical defects, wear, and safety concerns, and complete repairs consistent with applicable DOT, CHP, manufacturer, and workplace safety requirements.

• Evaluate, prioritize, and coordinate equipment repairs based on safety, operational needs, and vehicle downtime.

• Coordinate daily maintenance activities and communicate work priorities with other members of the Mechanics Team.

• Perform welding, fabrication, cutting, and mechanical adjustments as needed and when qualified.

• Conduct operational checks and authorized test drives to verify equipment performance after repairs.

• Troubleshoot complex mechanical issues and perform major repairs and rebuilds.

• Maintain accurate records of inspections, repairs, parts used, and maintenance performed.

• Communicate repair needs, equipment conditions, and the status of out-of-service vehicles to management and dispatch.

• Monitor parts inventory, identify needed supplies, and ensure parts and materials are properly stored and recorded.

• Maintain a clean, organized, and safe work area, including tools and equipment.

• Follow company safety procedures, report workplace hazards and incidents promptly, and participate in required safety meetings.

• Perform other related duties as assigned.

Required Qualifications

• Minimum of 3 years of professional experience in diesel truck or heavy equipment maintenance and repair.

• Strong knowledge of diesel engines and heavy-duty mechanical systems.

• Experience diagnosing and repairing mechanical, electrical, electronic, hydraulic, and pneumatic systems.

• Proficiency with computerized diagnostic equipment and troubleshooting procedures.

• Ability to read and interpret technical manuals, diagnostic reports, and equipment specifications.

• Experience performing preventative maintenance, inspections, and mechanical repairs.

• Ability to troubleshoot complex problems, identify appropriate repairs, and work with limited supervision.

• Ability to organize and prioritize maintenance tasks based on safety and operational needs.

• Ability to maintain accurate maintenance records and communicate repair findings effectively.

• Strong problem-solving skills, attention to detail, and commitment to safe work practices.

• Ability to work independently and collaboratively with a maintenance team.

• Ability to reliably report to the Lakeside, California work location.

• Ability to provide and maintain personal hand tools necessary for assigned work, consistent with applicable California law.

**Preferred Qualifications**

• Experience maintaining and repairing ready-mix concrete mixer trucks.

• Experience with Class 8 trucks, tractors, and heavy equipment.

• Familiarity with DOT/CHP vehicle inspections, air brake systems, and DVIR-related repairs.

• Experience with diesel emissions and aftertreatment systems.

• Welding and metal fabrication experience.

• ASE or other recognized diesel/heavy-duty mechanic certifications.

• CDL Class A or B is a plus but is not required.

• Previous experience coordinating maintenance activities or serving in a lead mechanic role.

**Physical Requirements and Working Conditions**

This position involves physically demanding work in an industrial maintenance environment. Essential functions may include:

• Frequently standing, walking, bending, kneeling, squatting, crouching, climbing, crawling, and working in restricted-access areas.

• Lifting and carrying tools, parts, and equipment weighing up to 50 pounds, with heavier items handled using appropriate assistance or lifting equipment.

• Working in various positions, including underneath vehi