Diesel Field Technician

Tall City Diesel Services LLC; Midland (TX); On-site; USD 30,000 - 47,000; Full time

Job summary

Tall City Diesel Services LLC is seeking a reliable field diesel mechanic to diagnose, maintain, and repair diesel engines on trucks, generators, and heavy equipment. You will operate on-site and mobile units, focusing on minimizing downtime, safety, and clear customer communication.

Ideal candidates have two years of hands-on experience with diesel systems, emissions knowledge, and strong diagnostic skills.

Qualifications

• Two years of hands-on field diesel mechanic experience preferred.
• Experience servicing trucks, generators, and heavy equipment.
• Ability to diagnose, repair, and communicate repair status clearly.

Responsibilities

• Perform preventative maintenance and inspections (oil/filter changes, coolant service, filters, belts, hoses).
• Diagnose and repair diesel engine problems (turbochargers, fuel systems, compression).
• Troubleshoot diesel‑related systems (cooling, exhaust, transmission interfaces, brakes, driveline).
• Work on emissions/aftertreatment systems (DPF, DEF checks).
• Use diagnostic tools (scanners, multimeter, gauges) to test and verify repairs.
• Perform on-site repairs and roadside service; document service reports and cost estimates.

Skills

Diesel repair

Fuel injection systems

Turbocharger maintenance

Emissions aftertreatment

Electrical troubleshooting

Diagnostic tools

Welding & fabrication

Tools

Diagnostic scanners

Multimeter

Compression tester

Fuel pressure gauge

Hand tools

Power tools

Job description

Reliable field diesel mechanic with two years of hands on experience performing on-site diagnostics, maintenance, and repairs on diesel engines and related systems for trucks, generators, and heavy equipment. Focused on minimizing downtime, ensuring safety, and delivering clear customer communication.

Job Description

Key Responsibilities

• Perform preventative maintenance and inspections: oil/filter changes, coolant service, fuel filter replacement, belts, and hoses.
• Diagnose and repair diesel engine problems: turbochargers, fuel injection systems (injectors, pumps, common-rail components), valve adjustments, and compression issues.
• Troubleshoot and repair diesel-related systems: cooling, intake/exhaust, turbo, transmission interfaces, brakes, and driveline components.
• Work with emissions and aftertreatment systems: DPF cleaning/diagnosis, DEF system checks, and basic ECM fault code interpretation.
• Use diagnostic tools and test equipment: multimeter, fuel pressure gauges, compression testers, OBD/diagnostic scanners, and handheld code readers.
• Perform roadside and on-site repairs: parts replacement, hose/fitting repair, basic welding, and emergency breakdown recovery.
• Complete service reports, parts usage logs, and communicate repair status, cost/time estimates, and safety concerns to dispatch and customers.
• Follow safety protocols (PPE, lockout/tagout) and proper handling/disposal of diesel fuel, oils, and hazardous materials.

Technical Skills & Tools

• Diesel engine repair (light to medium/heavy duty)
• Fuel injection systems (mechanical and electronic/common rail)
• Turbocharger maintenance and diagnosis
• Basic emissions aftertreatment knowledge (DPF, DEF)
• Electrical troubleshooting (12V-24V), sensor and starter/alternator service
• Use of diagnostic scanners, multimeter, compression tester, fuel pressure gauge, hand and power tools
• Basic welding and fabrication, hose/fitting replacement

Tall City Diesel Services is West Texas' go-to heavy-duty diesel repair experts. We provide service in-shop in Seminole, Texas &via 24/7 mobile service units in Midland / Odessa, Texas and servicing the Permian Basin. Get in touch today for more information, to request a quote, and to schedule service.