Diesel Field Technician

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.