JJC Alert: Due to a Comcast internet outage, the Romeoville, City Center, Morris and Weitendorf Campuses will shift to virtual operations starting at 4pm today, Nov. 25. All classes that begin after 4 pm at these extended campus locations are canceled.
The Main Campus is NOT impacted and operating normally.
Students with classes at these locations should check iCampus for course specific instructions from faculty members. Employees should connect with supervisors for further instructions. Check JJC.edu for updates. November 25, 2025 02:58:32
The Lead Diesel Technician will properly diagnose, overhaul, adjust and repair all series of truck and trailer equipment including but not limited to the following:
Engines (Gas and Diesel) – Adjustment, remove and reinstallation, tune-up, as necessary.
Transmissions (Manual & Automatic) – Remove and reinstallation, as necessary.
Differentials/Power Dividers – Remove and reinstallation, as necessary.
Starters/Alternators – Remove, repair, and replace, as necessary.
Air Conditioning System – Trained/Certified, component replacement, evacuation, and charging.
Fan Clutches – Remove and reinstallation, as necessary.
Power Steering Systems – Adjust and repair, as necessary.
Electrical/Brake/Colling Systems – Remove, reinstallation, adjustment as necessary (Brake Certified).
Clutches – Remove and reinstallation, as necessary.
PTO Systems – Remove and installation of PTO System and related hydraulic components, as necessary.
Tires- Remove, install and algin chassis.
Engine Electronics (Gas and Diesel) – Diagnose, adjust, and repair, as necessary.
Identify and determine parts required for repair of disassembled units.
Other duties as assigned.
Identify warrantable repairs and document appropriately.
Maintain work area appearance and safety.
Road test vehicles, as necessary.
Perform and prioritize duties in a timely and efficient manner.
All duties of lower job classifications.
Manage the workflow through the Service Department.
Supervise Technicians and Fuel Island Attendants.
Evaluate situations as they arise and make sound decisions in the absence of the Service Manager.
Communicate in a professional manner.
Manage the Fleet Service Operation in a manner that is consistent with the direction of the department.
Minimum of six 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.).
Be proficient in the use of all tools of the trade (welding equipment, power tools and shop machinery).
Commercial Driver’s License with air brake, combination, and tanker endorsements preferred.
High school diploma or equivalent.
Ability to lift, push or pull up to at least 100lbs.
Ability to provide the above major functions, specific duties and with the experience listed above.
Valid driver's license with acceptable Safety risk rating within Mahoney Environmental acceptable standards.
Ability to drive manual 8- and/or 10 and or 13 transmissions preferred.
Superb communication skills (written and verbal).