CNG Class A Fleet Mechanic – Heavy-Duty Truck Repair

Ecology Auto Parts, Inc.; Bloomington (CA); On-site; USD 34,000 - 55,000; Full time

Job summary

Ecology Auto Parts, Inc. in Bloomington, CA is seeking a CNG Class A Truck Mechanic to perform mechanical service, diagnostics, and repairs on heavy-duty fleet and CNG vehicles. The role emphasizes safety, regulatory compliance, and operational readiness in a fast-paced shop environment.

The ideal candidate has hands-on experience with Class A trucks, diesel or CNG systems, and strong diagnostic skills; ASE and CNG certifications are a plus. CDL is preferred but not required.

Qualifications

• High school diploma or equivalent required.
• Minimum of 2–4 years of hands-on experience servicing Class A trucks, heavy-duty vehicles, or commercial fleet equipment.
• Demonstrated experience diagnosing and repairing heavy-duty vehicle mechanical systems.
• Experience working with CNG-powered vehicles and CNG fuel systems preferred.
• Working knowledge of Class A truck systems, including engines, air brakes, suspension, steering, driveline, electrical, cooling, fuel, and emissions systems.
• Strong understanding of heavy-duty preventative maintenance procedures.
• Ability to safely diagnose and service CNG vehicle systems in accordance with applicable procedures and safety requirements.
• Ability to safely operate diagnostic scan tools, lifts, jacks, hand tools, power tools, and standard heavy-duty shop equipment.
• Strong mechanical aptitude with attention to detail and quality workmanship.
• Ability to read and follow work orders, manufacturer service procedures, wiring diagrams, technical documentation, and safety guidelines.
• Ability to troubleshoot mechanical, electrical, and drivability concerns systematically and independently.
• Ability to work independently while contributing effectively in a team environment.
• Reliable attendance, strong work ethic, and professional attitude.
• Valid driver's license required; clean driving record preferred.
• Class A CDL preferred but not required.
• ASE certifications, especially Heavy Truck, Diesel, or related certifications, are a plus.
• CNG/LNG vehicle service training or certification is a plus.
• Air brake experience and knowledge are a plus.
• Experience with commercial fleet maintenance and DOT-related inspections is a plus.

Responsibilities

• Perform intermediate to advanced mechanical repairs and maintenance on Class A trucks and heavy-duty fleet equipment.
• Diagnose and repair CNG-powered Class A trucks and related vehicle systems.
• Perform preventative maintenance services including oil and filter changes, fluid inspections, lubrication, cooling system maintenance, belt and hose inspections, and multi-point vehicle inspections.
• Diagnose, service, and repair braking systems, air brake systems, suspension components, steering systems, driveline components, axles, differentials, wheel-end components, and other heavy-duty vehicle systems.
• Diagnose and repair electrical and basic electronic systems, including batteries, starting and charging systems, lighting, sensors, wiring, and related components.
• Inspect and service CNG fuel systems and components in accordance with manufacturer specifications, company procedures, and applicable safety requirements.
• Inspect CNG tanks, valves, regulators, fuel lines, fittings, pressure-related components, and associated systems for damage, leaks, wear, or other safety concerns.
• Perform CNG system inspections and repairs only within the technician's training, certification, and authorization.
• Use diagnostic tools, scan tools, service information, schematics, and other equipment to identify mechanical, electrical, and drivability concerns.
• Troubleshoot engine performance, emissions-related, and fuel-system concerns on CNG-powered vehicles.
• Perform repairs and adjustments to ensure vehicles meet applicable safety, operational, and regulatory requirements.
• Conduct pre-trip, post-repair, and safety inspections as required.
• Accurately document repairs, labor, parts usage, inspections, and diagnostic findings in work orders or electronic maintenance systems.
• Inspect vehicles and equipment for safety concerns and report deficiencies to shop leadership promptly.
• Maintain a clean, organized, and safe work area in compliance with company safety standards, OSHA regulations, and applicable CNG safety procedures.
• Safely operate lifts, jacks, diagnostic equipment, hand tools, power tools, and standard heavy-duty shop equipment.
• Assist with inventory control related to parts, tools, fluids, shop supplies, and other maintenance materials.
• Coordinate with service writers, shop management, and operations staff to support efficient workflow and job prioritization.
• Follow all environmental, safety, hazardous-material, CNG, and operational policies and procedures.
• Participate in continuous improvement efforts related to fleet reliability, shop efficiency, service quality, safety, and preventative maintenance.
• Maintain awareness of manufacturer service procedures and applicable federal, state, and local requirements related to CNG-powered commercial vehicles.
• Perform additional duties and projects as assigned based on operational needs.

Skills

Heavy-duty systems

Diagnostics

CNG systems

Electrical systems

Mechanical troubleshooting

Safety compliance

Independent worker

Driver's license

Class A CDL preferred

Education

High school diploma or equivalent

Tools

Diagnostic tools

Lifts and jacks

Heavy-duty shop equipment

Job description

Ecology Auto Parts, Inc. in Bloomington, CA is seeking a CNG Class A Truck Mechanic to perform mechanical service, diagnostics, and repairs on heavy-duty fleet and CNG vehicles. The role emphasizes safety, regulatory compliance, and operational readiness in a fast-paced shop environment.

The ideal candidate has hands-on experience with Class A trucks, diesel or CNG systems, and strong diagnostic skills; ASE and CNG certifications are a plus. CDL is preferred but not required.