Diesel Service Technician Jobs in Illinois
Diesel Service Technician jobs in Illinois are concentrated in the Chicago metropolitan area, the Quad Cities corridor, and Rockford, where freight movement, agriculture equipment fleets, and municipal transit create consistent demand at every experience level from entry-level shop technician to senior fleet specialist. Major employers with lasting Illinois footprints include Caterpillar, Navistar, and Rush Enterprises, all of which maintain substantial service and parts operations across the state. The most in-demand specialties are heavy truck diagnostics, hydraulic systems repair, and emissions compliance work tied to Illinois EPA requirements. Find a role that fits below and apply directly.
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Job Overview
We are seeking a highly skilled and motivated Diesel Mechanic Service Technician to join our dynamic team. You will be responsible for diagnosing, repairing, and maintaining a wide range of heavy-duty diesel equipment, including industrial machinery, farm equipment, and commercial vehicles. Your expertise will ensure optimal performance, safety, and reliability of our fleet and equipment. This position offers an exciting opportunity to work with cutting-edge technology and diverse machinery in a fast-paced environment dedicated to excellence in service.
We are also looking for entry level position mechanics to do tires brakes oil changes.
Duties
- Perform comprehensive diagnostics using OEM (Original Equipment Manufacturer) schematics and automotive diagnostics tools to identify mechanical, electrical, hydraulic, and pneumatic issues.
- Conduct repairs and maintenance on diesel engines, transmissions, brakes (including air brake systems), suspensions, hydraulics, and steering components.
- Fabricate and modify parts using power tools, welding equipment, soldering techniques, and hand tools to meet specific repair needs.
- Service heavy equipment such as excavators, cranes, forklifts, tractors, and other farm machinery to ensure safety and operational efficiency.
- Execute tire services including mounting, balancing, and replacing tires on various vehicles and equipment.
Skills
- Familiarity with tractor-trailer, HVAC systems, and other industrial equipment.
- Ability to read and interpret schematics for electrical systems, hydraulics, suspension components, and powertrains.
- Skilled in the use of hand tools, power tools, diagnostic scanners, alignment equipment, and other service tools.
- Mechanical knowledge of transmissions, air brake systems (including heavy-duty trucks), tire service procedures, and vehicle diagnostics.
- Experience working with OEM parts and understanding manufacturer specifications for repairs.
- Strong customer service skills with the ability to communicate technical information clearly to team members.
- Capable of heavy lifting safely while performing repairs or moving equipment as needed.
Pay: $25.00 - $45.00 per hour
Benefits:
- 401(k)
- Health insurance
Work Location: In person
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Find JobsDiesel Service Technician Jobs by City in Illinois
Where Illinois roles are concentrated, by current openings.
Diesel Service Technician Job Market in Illinois
A snapshot from current Illinois openings, updated as new roles post.
Who's Hiring
What Illinois Employers Look For
The qualifications that appear most often in diesel service technician jobs across Illinois.
- ASE Medium/Heavy Truck certification preferred or required by most Illinois employers
- Valid Illinois commercial driver's license or ability to obtain one for road testing
- Proficiency with electronic diagnostic software such as Cummins Insite or Detroit Diesel Diagnostics
- Two or more years of hands-on diesel engine repair and preventive maintenance experience
- Ability to read and interpret technical service manuals, wiring diagrams, and repair orders
- Own a personal set of professional-grade hand tools sufficient for diesel repair work
Diesel Service Technician Jobs in Illinois: Frequently Asked Questions
How do you become a diesel service technician in Illinois?
The most direct path is completing a diesel technology program at an Illinois community college such as Illinois Central College, Parkland College, or Moraine Valley Community College, which offer certificates and associate degrees that align with industry expectations. Illinois does not require a state-issued license specifically for diesel service technicians, but employers consistently expect ASE Medium and Heavy Truck certification. Earning those credentials alongside hands-on shop experience positions candidates competitively for openings across the state.
Which companies hire diesel service technicians in Illinois?
Companies currently hiring diesel service technicians in Illinois include The Larson, MHC Kenworth, and Meiborg Companies, per current listings on Migrate Mate as of September 2026. Illinois's dense freight network and large municipal fleet operations mean hiring activity remains strong with both national service chains and regional independent shops throughout the state.
Which Illinois cities have the most diesel service technician jobs?
Sauget, Alsip, and Pekin account for the largest share of diesel service technician openings in Illinois. The Chicago metro dominates due to its massive logistics infrastructure, O'Hare-area freight operations, and large municipal bus and truck fleets, while smaller markets like Peoria and Rockford are anchored by Caterpillar's manufacturing presence and established regional trucking hubs that sustain steady shop demand.
Are there remote diesel service technician jobs in Illinois?
Yes, but they're rare. About 0% of diesel service technician openings tied to Illinois are remote or hybrid as of September 2026, which reflects how hands-on the role is by nature. The portions of the work most suited to remote arrangements are warranty documentation review, parts ordering coordination, and technical support roles where experienced technicians assist field teams without turning wrenches directly.
How can I get hired as a diesel service technician in Illinois with little or no experience?
The most realistic entry path is enrolling in a diesel technology certificate program at an Illinois community college, then pursuing a lube technician or service writer position at a dealership or fleet shop while building hours. Illinois employers including Navistar and Rush Enterprises run apprenticeship and technician development programs designed for candidates early in their careers. Candidates who come in with ASE Student Certification and experience from light-duty auto repair shops often move into diesel roles faster than those starting entirely from scratch.
Where can I find and apply to diesel service technician jobs in Illinois?
You can find and apply to diesel service technician jobs in Illinois on Migrate Mate, which lists current Illinois openings from employers hiring now. Find roles that fit your experience level and location, then apply directly to the ones that make sense for you.
See All 7 Diesel Service Technician Jobs in Illinois
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