Summary/Objective
The Diesel/Tech Mechanic role encompasses a range of skill levels, from entry-level apprentices to seasoned master mechanics. Our technicians work on a variety of heavy-duty trucks, trailers, and fleet equipment, performing preventative maintenance, diagnostics, and complex repairs.
Role Levels & Responsibilities
C-Level Tech (1–3 Years) – Apprentice / Lube & Tire Technician
Overview:
Entry-level mechanics who are learning the fundamentals of fleet and truck maintenance under close supervision.
Key Responsibilities:
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Perform preventative maintenance (A, B, C services) including oil changes, filter replacements, and chassis lubrication.
- Inspect, adjust, and replace air brakes, brake shoes, drums, slack adjusters, wheel seals, and bearings.
- Use OBD-II or heavy-duty scan tools to pull basic fault codes.
- Inspect tires, check tire pressure, and identify basic suspension issues (worn leaf springs, shocks, leaking airbags).
- Test and replace coolant, transmission fluid, and differential fluid.
- Follow strict shop safety protocols: proper lifting, jack-stand placement, and lockout/tagout procedures.
- Perform daily tasks including brake shoe and drum replacements, basic lighting/wiring repairs, tire changes, and mud flap replacements.
- Earn basic air brake certifications and Federal DOT inspection certifications.
- Develop attention to detail, performing work correctly the first time to meet dealership-level standards
B-Level Tech (4–7 Years) – Mid-Level / Journeyman Mechanic
Overview:
Mechanics at this stage work independently, troubleshooting, replacing components, and mastering electrical and emissions systems.
Key Responsibilities:
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Perform advanced electrical troubleshooting using wiring schematics and multimeters.
- Diagnose and repair emissions and aftertreatment systems (DPF, DEF, SCR, EGR).
- Service HVAC systems: recover, vacuum, recharge AC, diagnose compressors and leaks.
- Replace clutches, diagnose transmissions (manual & automated), and repair drivelines and differentials.
- Troubleshoot air systems, replace air compressors, governors, and pneumatic valves.
- Understand hydraulics: replace PTOs, hydraulic pumps, repack cylinders (if applicable).
- Proficient in suspension, ABS diagnostics, and air systems.
- Perform complex daily tasks: rebuild suspensions, replace airbags and landing gear assemblies, repair wiring harnesses, basic welding/fabrication.
- Handle daytime roadside service or on-call hours independently.
- Cross-train in trailer mechanics, OEM-specific systems, or transport refrigeration.
- Optional specialization (B+): welding, fabrication, or other advanced skills.
A-Level Tech (8–14 Years) – Senior / Master Technician
Overview:
Experienced mechanics responsible for complex diagnostics, major rebuilds, and OEM-specific expertise.
Key Responsibilities:
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Perform engine overhauls, including in-frame and out-of-frame rebuilds.
- Use manufacturer-specific diagnostic software (Cummins INSITE, Detroit Diesel Diagnostic Link, CAT ET) for advanced troubleshooting.
- Diagnose multiplexing/CAN bus communication failures and intermittent electrical issues.
- Perform basic welding and fabrication to repair frames, brackets, or extract broken bolts.
- Lead major repairs: trailer body collision repair, reefer unit overhauls (if certified).
- Manage parts inventory, perform internal quality audits, and ensure zero comebacks.
- Mentor and train junior mechanics, setting high standards for workmanship and safety.
Veteran Tech / Shop Foreman (15+ Years) – Master Fleet Technician
Overview:
Mechanics with extensive experience in modern and legacy systems, focusing on leadership, workflow optimization, and operational efficiency.
Key Responsibilities:
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Train apprentices and guide journeymen through complex repairs.
- Manage workflow, estimate repair times, and delegate tasks effectively.
- Troubleshoot both legacy mechanical and modern computerized systems.
- Administer warranty claims and ensure compliance with OEM standards.
- Predictive maintenance to prevent costly breakdowns.
- Perform quality checks on all shop work and complex diagnostics.
- Lead by example, fostering a culture of ownership, pride, and excellence.
- Transition into formal leadership roles (Shop Foreman, Lead Technician, Shift Supervisor).
Qualifications (All Levels):
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High school diploma or equivalent required; technical school training preferred.
- Valid CDL (if performing on-road service) may be required.
- Strong mechanical aptitude and desire to learn.
- Ability to follow safety protocols and work in a fast-paced environment.
- Commitment to teamwork and mentorship (for senior levels).
Summary/Objective
The Diesel/Tech Mechanic role encompasses a range of skill levels, from entry-level apprentices to seasoned master mechanics. Our technicians work on a variety of heavy-duty trucks, trailers, and fleet equipment, performing preventative maintenance, diagnostics, and complex repairs.
