Diesel Tech Mechanic

Description

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:

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:

• 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 drive lines 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:

• 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:

• 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).

Requirements

Qualifications (All Levels):

• 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).