Heavy Diesel Mechanic​/Field Mechanic

Company Overview

Diamond D Industries is the nation’s leading women‑owned heavy construction specialist. Based in South Louisiana, DDI offers clearing, access, site preparation, logistics, and storm response services throughout North America.

Heavy Diesel Mechanic/Field Mechanic is responsible for inspecting, repairing, and maintaining diesel engines and related systems in trucks and heavy machinery to ensure they operate efficiently and safely. Tasks include performing routine maintenance and repairs on trucks and primarily Caterpillar equipment in shop or various field sites.

• Diagnose and repair mechanical, electrical, and engine issues on a wide variety of heavy‑duty trucks, trailers, and Caterpillar equipment.
• Service newer trucks with modern emissions systems (EGR, DEF, SCR, etc.) including troubleshooting and repairs on diesel engines and related components.
• Diagnose and repair complex electrical issues, including troubleshooting wire, sensors, engine control modules, and other truck electronics.
• Proficient in repairing diesel engines, transmissions, differentials, fuel systems, turbochargers, brakes, hydraulic systems, and exhaust systems.
• Inspect, diagnose, and repair suspension systems, braking systems, and related components to ensure safety and performance.
• Inspect and repair trailers, including brake and air systems, lighting, tires, and axles.
• Perform routine maintenance to keep vehicles in peak operating condition, performance, and longevity.
• Maintain accurate records of repairs, inspections, and maintenance activities to remain compliant with company and regulatory standards.
• Work closely with Equipment Manager, Project Managers, drivers, and other mechanics to ensure timely and efficient repairs.
• Adhere to all safety regulations and company policies while promoting a culture of safety among team members.
• Any additional tasks or projects assigned by supervisor.

• 5 years experience as a heavy diesel mechanic and trailer mechanic.
• Proficient in diagnosing and repairing emissions systems.
• Proficient in diagnosing and repairing electrical systems, engine control systems, and complex mechanical problems.
• Proficient in reading and understanding technical documents, diagrams, and service manuals.
• Comfortable using advanced diagnostic tools and software for troubleshooting truck electronics and emissions systems.
• Displays strong problem‑solving skills.
• Willing to work extended hours.
• Knowledge of HCSS systems or other proprietary software.
• Ability to work in a fast‑paced environment.
• Formal diesel mechanic training or related field is preferred.
• ASE certifications a plus.
• Valid driver’s license; CDL A preferred.
• Ability to work in various weather conditions and perform physically demanding tasks.
• Strong communication skills and the ability to work effectively within a team environment.
• Successful candidates must complete a drug screening and background check prior to employment.