Diesel Technician III

Mahoney Environmental Solutions, LLCJoliet, IL
$33 - $35Onsite

About The Position

The Diesel Technician III will strive to meet or exceed goal times for repairs. Able to work unsupervised for extended periods of time and assist in training technicians in lower job classifications. This role involves diagnosing, overhauling, adjusting, and repairing various truck and trailer equipment, including engines, transmissions, differentials, starters, alternators, air conditioning systems, fan clutches, power steering systems, electrical/brake/cooling systems, clutches, PTO systems, tires, and engine electronics. The technician will also perform preventative maintenance, identify parts for repair, document warrantable repairs, maintain a safe work area, road test vehicles, and perform duties of lower job classifications. The position requires working outdoors in different weather conditions and may involve exposure to used cooking oil odors.

Requirements

  • Minimum of six (6) years practical experience or an equivalent combination of related education and experience.
  • Specialized training and/or experience in the overhaul of major components (i.e., Mack – Cummins - Detroit Diesel Engines, etc.).
  • Proficient in the use of all tools of the trade (Welding equipment, power tools and shop machinery).
  • High school diploma or equivalent required.
  • Ability to lift, push or pull up to at least 50 lbs.
  • Good driving record with valid driver's license.
  • Ability to drive automatic transmissions and use of PTO.
  • Superb communication skills (verbal and written).
  • Brake certified.
  • Trained/Certified in Air Conditioning Systems.

Nice To Haves

  • Assist in training technicians in lower job classifications.

Responsibilities

  • Properly diagnose, overhaul, adjust and repair all series of truck and trailer equipment including but not limited to Engines (Gas and Diesel), Transmissions (Manual & Automatic), Differential/Power Dividers, Starters/Alternators, Air Conditioning Systems, Fan Clutches, Power Steering Systems, Electrical/Brake/Cooling Systems, Clutches, PTO Systems, Tires, and Engine Electronics (Gas and Diesel).
  • Perform all levels of preventative maintenance.
  • Identify and determine parts required for repair of disassembled units.
  • Identify warrantable repairs and document appropriately.
  • Maintain work area appearance and safety.
  • Road test vehicles as necessary.
  • Perform duties of lower job classifications.
  • Follow all safety rules and procedures.
  • Fully participate and support all safety initiatives.
  • Think safety and continually scan the work environment; make suggestions for corrections and improvements.
  • Other duties as assigned.

Benefits

  • Medical, Dental and Vision insurance 1st of the month following hire date.
  • 401 K with 4% company match after 90 days.
  • Tool reimbursements
  • Tool insurance
  • Yearly work boot allowance
  • Safety training
  • Freightliner factory training
  • Kenworth factory training
  • Cummins training
  • $2,000 sign on bonus
© 2026 Teal Labs, Inc
Privacy PolicyTerms of Service