Diesel Mechanic / Heavy-Duty Truck Diagnostic Technician

Job Description

Job Description

BIT Pros, Inc. is seeking an experienced Diesel Mechanic / Heavy-Duty Truck Diagnostic Technician to join our Escondido service and repair team.

We specialize in fire apparatus, emergency vehicles, and commercial fleet maintenance and repair. We are looking for a skilled technician with a strong background in diesel engines, electrical diagnostics, and independent troubleshooting .

The ideal candidate understands how mechanical and electrical systems operate, can accurately diagnose complex problems, and is comfortable using diagnostic software, technical resources, and systematic testing procedures to identify root causes.

Fire apparatus experience is not required. We welcome experienced commercial truck technicians who are interested in expanding their expertise into emergency vehicle service and repair through company-paid specialized training.

Key Responsibilities

• Diagnose, maintain, and repair medium- and heavy-duty diesel trucks and commercial vehicle systems.
• Troubleshoot diesel engines, fuel systems, electrical components, drivetrains, hydraulics, and pneumatic systems.
• Diagnose starting and charging problems, electronic engine controls, and emissions/aftertreatment systems.
• Inspect, diagnose, and repair air brake systems and related components.
• Use OEM diagnostic software, multimeters, wiring diagrams, and manufacturer service information to identify and resolve problems.
• Perform preventative maintenance, inspections, and safety checks.
• Independently research technical issues and determine appropriate diagnostic and repair procedures.
• Accurately document repairs using clear problem–cause–correction descriptions.
• Communicate diagnostic findings, recommendations, and repair status professionally.
• Assist with fire apparatus and emergency vehicle repairs as training and experience progress.

Required Qualifications

• 3+ years of professional diesel or medium/heavy-duty commercial truck repair experience, including independent diagnostic work.
• Strong understanding of diesel engine operation, fuel systems, starting and charging systems, and electronic engine controls.
• Demonstrated electrical troubleshooting ability, including reading wiring diagrams and performing voltage-drop and circuit testing.
• Working knowledge of air brake systems, DPF/SCR emissions systems, and commercial vehicle components.
• Experience using electronic diagnostic software, scan tools, and technical service information.
• Ability to independently diagnose problems, identify root causes, and verify repairs.
• Strong computer skills and ability to research unfamiliar technical problems.
• Ability to produce accurate written repair documentation and communicate technical findings clearly.
• Ownership of standard professional mechanic's tools.
• Valid driver's license.

Preferred Qualifications

• Experience with Freightliner, International, Peterbilt, Kenworth, or similar commercial truck platforms.
• Experience diagnosing Cummins, Detroit Diesel, PACCAR, or other heavy-duty diesel engines.
• Advanced electrical diagnostics, CAN/J1939 communication systems, and electronic controls.
• ASE, manufacturer-specific, or commercial vehicle inspection certifications.
• Class A or B commercial driver's license.
• Fire apparatus or emergency vehicle experience.

Training & Career Advancement

BIT PROS provides company-paid approved technical training, continuing education, and certification opportunities.

Qualified technicians will have opportunities to develop specialized skills in fire apparatus systems, including fire pumps, foam systems, and emergency vehicle electrical equipment.

Advancement opportunities into independent mobile/field service assignments are available based on demonstrated competency and experience.

BIT Pros, Inc. specializes in fire apparatus, emergency vehicle, and commercial fleet diagnostics, maintenance, repair, and testing.

Company Description

BIT Pros, Inc. specializes in fire apparatus, emergency vehicle, and commercial fleet diagnostics, maintenance, repair, and testing.