C4 Technical ServicesVerified Source

Tractor Trailer Technician, Diesel Repair & Maintenance

42K–83K
Onsite · Boston, Massachusetts
Posted August 12, 2026
payroll

Overview

You will own maintenance, repair, and inspection of semi-trailers, keeping a fleet roadworthy at a Boston repair shop. You will diagnose mechanical, electrical, and structural issues, from air brakes to refrigeration units, and deliver repairs that meet DOT standards. Working with a team of Level B and C technicians, you will mentor and guide less experienced staff. This role stands out because you can work across skill levels and shifts, with opportunities to specialize in complex repairs.

What You'll Do9

  • 1Diagnose and repair electrical wiring, roofs, panels, upper couplers, and rear door frames independently.
  • 2Troubleshoot and repair air brake systems, including ABS, and all aspects of spring and air ride suspensions.
  • 3Assemble axle wheel assemblies with proper torque procedures, including hub and drum assemblies, bearings, seals, and races.
  • 4Troubleshoot and repair all electrical systems, including lights, 7-way receptacles, interior lighting, and switches.
  • 5Repair body and undercarriage damage on all trailer types, from small panels to structural repairs.
  • 6Perform diagnostics and maintenance on refrigeration units.
  • 7Execute preventative maintenance: maintain oil levels, tire pressure, grease fittings, and adjust S-cam brakes.
  • 8Mentor Level B and C technicians, providing guidance and training on complex repairs.
  • 9Complete work orders per SOPs and document all work performed and parts used.

Requirements7

  • 15+ years of trailer maintenance and repair experience or training.
  • 2Proven ability to independently perform complex mechanical repairs.
  • 3Advanced carpentry, welding, or fabrication skills.
  • 4Strong knowledge of trailer systems, including air brakes and suspensions.
  • 5Understanding of DOT regulations.
  • 6Basic computer proficiency for documentation.
  • 7Physical ability: lift 40 pounds, work at heights, and work in confined spaces.

Salary Insight

$42 - $83k per year

Location

Typeonsite
LocationBoston, Massachusetts

Required Skills

Mechanical expertiseAir brake repairSuspension adjustmentElectrical wiringWeldingFabricationDOT regulations knowledgeSafety awarenessComputer systems proficiency
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