Robert J. Stellhorn
Durand,MI
Summary
Dedicated diesel mechanic with over 20 years of experience in maintenance, repair, and customer service, supported by a strong background in team supervision. Proficient in working with gas, propane, diesel, and electric equipment, including lithium and lead-acid systems. Expertise gained from tenure at Caterpillar, focusing on construction equipment and standby power systems. Factory certified in Tier 4 CAT emissions, with 16 years in the trucking industry handling all makes and models of Class 8 commercial vehicles. Additional skills include auto repair and small engine repair for both 2-stroke and 4-stroke engines, positioning for a supervisory role that leverages extensive technical knowledge and leadership capabilities.
Overview
29
29
years of professional experience
1
1
Certification
Work History
A Class Mechanic
MacAllister Rentals
09.2018 - 09.2025
- Diagnosis and repair of engine, hydraulic systems relating to ultra and boom lifts. Caterpillar earth moving equipment Genie, JLC, Skyjack, Skytrack and Mech, Computer diagnostics. Welding and fabrication. Repair of DC equipment boom lifts and rail lifts. Repair and Diagnostics of tractor trailers maintaining their fleet of delivery vehicles. Continued training as required by Caterpillar for T3 and T4 final engines. My areas of expertise are electrical and electronics, hydraulics, and Advanced engine Emission technology.
- Performed diagnostic and troubleshooting procedures to find and identify root causes of mechanical issues.
- Kept equipment in good working order by following operating instructions, troubleshooting breakdowns, and maintaining supplies.
- Maintained a safe working environment at all times by adhering to company guidelines and OSHA regulations, reducing workplace accidents.
- Inspected and tested equipment to locate worn and damaged parts.
- Raised safety standards for vehicles by performing comprehensive brake system repairs and replacements.
- Reduced downtime for clients by efficiently completing maintenance tasks and repairs on time.
Second Shift Shop Supervisor
Reliable Carriers
01.2014 - 01.2018
- Manage second shift employees, diagnosis of hydraulic systems and general trailer repair, Oversee fabrication projects for every aspect of specialized auto haulers. Oversee and manage preventative maintenance of both tractors and trailers and repair of specialized equipment for APU’s auxiliary power units for bunk support system that powers 220 AC voltage. Tractor repair also included engine repairs, drive train, brakes, suspension, HVAC electrical, computer diagnostics and 5th wheel re-build.
Second Shift Leadman
Star Truck Rental
01.2009 - 01.2014
- Lead Mechanic Supervisor, maintain work orders, supervise and advise mechanics in diagnosis and repair of tractors and trailers, maintain the rental department and rental customers, and manage service calls with national lease customers.
Mechanic
Republic Waste Services
01.2006 - 01.2009
- Preventative maintenance and repair of roll off recycle units, end loaders and front loaders.
Field Service Mechanic
Mickocem LLC
01.2004 - 01.2006
- Mechanic to 28 cemeteries in Michigan. My duties included service road calls, diagnosis, repair and preventative maintenance of corporate vehicles, off road equipment and heavy equipment.
Mechanic
Grand Oaks Auto Repair
01.2002 - 01.2004
- Auto Mechanic, heavy engine repair, tune-up, brakes, suspension, steering and electrical repair.
Maintenance
Childs Lake Estates
01.1997 - 01.2002
- Ground maintenance including snow removal, watermain breaks, checking PH levels and adjusting chlorine and Aqua mag levels in the well house, Weekly flushing the water lines, maintain the beach areas, adding sand to the beach every year, adding and removing buoys, cleaning sand with Billy goat machine, clubhouse maintenance, on call for emergencies. Pothole repairs. Maintaining water service taps, meters and main electrical breakers to residents homes. Operating and maintaining the generator for well house during power outages.
Education
T3, T4, Engine emission technologies
Caterpillar Advanced Engine Tech
01.2024
Certificate - Engineering Level 3 of Maxxforce engine electronics and electrical systems controllers
Navistar
01.2013
Firefighter 1, Firefighter 2, Hazmat, Response and Operations, Medical First Responder, Life Safety Education, EMT Basic, Officers Training
Oakland Community College
01.1998
Diploma - undefined
Enterprise High School
01.1993
Skills
I excell at electrical and computer diagnostics, Hydraulics and mechanical repair I have been in supervision as lead man and 2nd shift shop supervisor I am seeking a supervision position where I feel my skills are best suited to help the younger work force to sharpen there skills I have always worked by the ethics from fire fighter officers training always lead by example and never ask your staff to do something you would not feel comfortable doing
Certification
- I am State and ASE certified with a CDL-A. I also have training and certifications in both freightliner and Navistar.
- Hydraulics both large and small applications
- Engine, electrical and computer diagnosis and repair
- Transmissions both manual and aromatic
- Air brakes, HD Hydraulic, Automotive Hydraulic and ABS
- HVAC a/c
- Suspension and Steering
- Leyman and Maxon Liftgates
- Heil bodies and hydraulic systems
- Off road equipment, JCB backhoes, Caterpillar bulldozers and excavators
- Perkins Phaser 424, International DT 466, DT 530, DT 9, 10, 13 Big bore, Cummings ISM, ISX, ISB, ISC, Caterpillar C/12, C/15, Detroit Deisel Series 60, DD13, Mack E7, E8, MP7
Timeline
A Class Mechanic
MacAllister Rentals
09.2018 - 09.2025
Second Shift Shop Supervisor
Reliable Carriers
01.2014 - 01.2018
Second Shift Leadman
Star Truck Rental
01.2009 - 01.2014
Mechanic
Republic Waste Services
01.2006 - 01.2009
Field Service Mechanic
Mickocem LLC
01.2004 - 01.2006
Mechanic
Grand Oaks Auto Repair
01.2002 - 01.2004
Maintenance
Childs Lake Estates
01.1997 - 01.2002
Certificate - Engineering Level 3 of Maxxforce engine electronics and electrical systems controllers
Navistar
Firefighter 1, Firefighter 2, Hazmat, Response and Operations, Medical First Responder, Life Safety Education, EMT Basic, Officers Training
Oakland Community College
Diploma - undefined
Enterprise High School
T3, T4, Engine emission technologies
Caterpillar Advanced Engine Tech
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