Skip to content

Diesel Technician III

Technicians Skilled and Trades

Knight's Companies is seeking experienced Diesel Technician III for our Columbia (Irmo) shop to performing maintenance and repairs on diesel and non-diesel vehicles and heavy equipment to sound, safe, and reliable performance of the vehicle and/or equipment, as well as provide guidance and assistance to level I and level II Diesel Technicians. Qualified candidates must have a working knowledge of hydraulics, brakes and tires. Experience in CAT, Cummins and Detroit Diesel engines a plus. Valid driver's license is required.


  • Perform all job functions in accordance with federal, state, local, and company safety policies and procedures at all times.
  • Perform all job functions in accordance with federal, state, local, and company environmental policies and procedures at all times.
  • Change and repair tires per manufacturer specifications.
  • Perform oil and filter services on automobiles, concrete trucks, tractor trailers, front end loaders, and various types of equipment.
  • Diagnose and repair minor to mid-level electrical issues of equipment lights, switches, etc. on affected trucks and equipment.
  • Diagnose and repair minor to mid-level mechanical issues on affected trucks and equipment.
  • Test power and hydraulic systems to ensure operation per manufacturer specifications.
  • Complete required lubrication and greasing of all wear items on affected trucks and equipment.
  • Diagnose and repair wheel bearings, hub assemblies, and seals on steer and drive axles.
  • Remove and repair universal and slip joints, and support bearings on drive shafts.
  • Diagnose and repair air and hydraulic brake systems and pressurized water systems.
  • Perform major diagnosis and repair of gas and diesel engines.
  • Complete engine reconditioning service.
  • Diagnose and repair fuel injection, transmission, and regeneration systems using laptop and scan tool diagnostic tools.
  • Remove, disassemble, diagnose, and repair differentials.
  • Remove and repair automatic and manual transmissions.
  • Diagnose and repair major electrical systems (12 and 24 volt).
  • Perform service calls to diagnose and repair off-site trucks and equipment using company service vehicle.
  • Return affected vehicles or equipment to service as efficiently as possible, while ensuring accurate repairs have been made.
  • Maintain cleanliness and orderliness of the company service vehicle.
  • Ensure that all tools and equipment is returned to the proper location in the company service vehicle.
  • Perform other duties as assigned.

Minimum Requirements:

  • Auto or diesel technology diploma from an accredited technical school preferred OR
  • Minimum of 5 years' experience performing maintenance or mechanical ability.
  • ASE Certifications preferred.
  • Commercial Driver's License Class A or B preferred.
  • Ability to operate a manual transmission vehicle to determine if operating properly.
  • Must provide own hand tools & toolbox.
  • Knowledge of hand held scan tools and the process of diagnosing vehicles.
  • Ability to read schematics and familiarity with the process.
  • Proficient computer skills: knowledge of Excel, Word, Fleet Management Systems, and Email
  • Strong written and verbal communication skills (documentation, communication with peers, supervisors, etc.)


  • Medical, Dental, Vision, and Life Insurance
  • 401(k) with Company match
  • Paid Time Off / Paid Holidays
  • Annual Boot Reimbursement
  • Uniforms

Drug free workplace / Equal Opportunity Employer

Apply today at 

Powered By GrowthZone
Scroll To Top