Trailer Maintenance Shop Mechanic

Donaghy Sales LLC; Fresno (CA); On-site; USD 55,000 - 75,000; Full time

Job summary

Donaghy Sales LLC in Fresno, CA is seeking a Trailer Maintenance Shop Mechanic for a full-time role in the Maintenance Shop. The technician inspects, diagnoses, services, and repairs commercial trailers and heavy equipment to keep them safe and compliant with DOT/FHWA standards.

Ideal candidates have 1–5+ years of hands-on mechanical experience, knowledge of tools and welding, and the ability to read electrical and air system schematics. CDL is a plus, and a strong safety mindset is essential.

Qualifications

• 1 to 5+ years of hands-on mechanical experience with heavy-duty trailers or trucks.
• Proficiency reading electrical and air system schematics.

Responsibilities

• Perform routine safety checks and scheduled maintenance on brakes, suspension, axles, and landing gear.
• Troubleshoot and repair electrical wiring, lighting, ABS, air lines, and hydraulics.
• Repair or replace flooring, rub rails, body panels, roofs, and doors using MIG/Stick welding.
• Document DOT inspections, parts used, and repair hours in the shop management system.
• Maintain a safe, clean, organized workspace per OSHA and company safety guidelines.

Skills

Heavy-duty trailer maintenance

Electrical schematics

Welding & fabrication

Tools

Hand tools

Power tools

Jacks

Torches

Welding equipment

Job description

Job Description: Trailer Maintenance Shop Mechanic

Position Type: Full-Time

Department: Maintenance Shop

Reports To: Shop Supervisor/Fleet Manager

Position Overview

The Trailer Maintenance Shop Mechanic is responsible for inspecting, diagnosing, servicing, and repairing commercial semi-trailers and heavy-duty transport equipment. The primary focus is to ensure the trailer remains safe, highly reliable, and fully compliant with DOT and FHWA regulations.

Core Responsibilities

• Perform routine safety checks, scheduled maintenance, and lubing on brakes, suspension, axles, and landing gear systems.
• Troubleshoot and repair electrical wiring, lighting systems, ABS brakes, air lines, and hydraulic components.
• Repair or replace damaged flooring, rub rails, aluminum body panels, roofs, and doors using welding and fabrication equipment (MIG/Stick).
• Conduct comprehensive DOT inspections and document all findings, parts used, and repair hours accurately within the shop management system.
• Maintain a safe, clean, and organized workspace, adhering strictly to OSHA and company safety guidelines.

Key Qualifications & Requirements

• Experience: 1 to 5+ years of hands-on mechanical experience working on heavy-duty commercial trailers, medium/heavy trucks, or equivalent vocational training.
• Technical Skills: Strong proficiency using hand tools, power tools, jacks, torches, and welding/cutting equipment. Ability to read electrical and air system schematics.
• Physical Stamina: Ability to lift up to 50-75 lbs regularly, bend, kneel, crawl, and stand for extended periods in a shop environment.
• Tools & License: Possession of a valid driver’s license (CDL is a plus).