College of Applied Technologies

Diesel Technology

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The Diesel Industry is booming and is a constant factor in our economy.  As they say “If you bought it … a truck brought it!”   Few programs in the country are growing faster than Diesel.  If you are considering a career as a Diesel Technician, the University of Northwestern Ohio is the right choice. The job responsibilities of diesel service technicians are becoming more complex as more electronic components control engine operation. 

The University's Diesel program is unique because our curriculum is up-to-date with EPA engine requirements. We utilize computer engine programs and our students are taught with modern equipment and training aids.

Students at UNOH can choose to study Medium/Heavy Duty Diesel Technology or Light Duty Diesel Technology.


of diesel technology Graduates are Employed or Continuing their Education *

Both the Medium/Heavy Duty and Light Duty diesel programs will focus on general knowledge of the vehicle and its engine components, learning how to troubleshoot problems, and using computer software to run diagnostic procedures.  The differences come in the type of vehicles students will learn to service. 

Medium/Heavy Duty diesel technicians will work on diesel engines and vehicles designed for shipping, farming, construction, and more such as semi-trucks, buses, and rail engines.  Light Duty diesel technicians will focus on 8.0 liter diesel engines and smaller which are designed for on-the-road consumer cars and trucks as well as compact tractor and skid-steer engines.

Our students train with the same tools and latest equipment that is found in service centers and dealerships across the nation, using diesel truck and engine manufacturers training aids from: Cummins, Detroit, Mack, Volvo, Caterpillar, DuraMax, Power Stroke and many more.

As a student in the UNOH College of Applied Technologies' diesel program, you can also get your CDL.  You will gain the classroom and hands-on knowledge you need to pass the state exam with our several big rigs and a specially designed course. Best of all, we pay for your fees when you sit for the Ohio Class A state license which can be transferred out of state.

To open up even more career doors, you can choose to enhance your training by applying for the Diesel Advanced Technology Education (DATE) program to become a Professional Level Technician for Mack Trucks and Volvo Trucks.  These additional two sessions of coursework will prepare students to be immediately employed at any of the hundreds of Mack and Volvo truck dealerships across North America.  

All of our students have the opportunity to take ASE tests to become ASE Certified, an industry-wide certification of excellence.  As a benefit to you, the University will cover the cost of up to two ASE tests for each student.

Courses include:

  • Diesel Performance and Diagnosis
  • Diesel Engines Electronic Controls
  • Truck Air Systems, Brakes, and Preventative Maintenance
  • Heavy Equipment and Vehicle Integrated Electronics
  • Diesel Steering and Suspensions
  • Truck Drive Trains
  • Diesel Engine Diagnosis and Repair

Important Facts:

  • 20 Students Per Class Maximum
  • 70% Hands-On Training
  • Coeducational Campus
  • Student Activities Year-Round
  • Over 20 Clubs to Join
  • Free Admittance to UNOH Indoor Athletic Complex, UNOH Athletic Events, and Limaland Motorsports Park


Wage Estimates and Job Outlook

The Diesel Technology field is a huge market filled with many job opportunities. According to the U.S. Bureau of Labor Statistics (BLS), the average annual wage of a Bus, Truck, and Diesel Engine Specialist or Mechanic is $47,350! Annual earnings range between $37,710 and $72,110 per year depending on your job title and location of employment. Also according to the BLS, there are expected to be at least 25,800 new positions available for graduating technicians in the coming years.**

*Percentages are based on surveys of our 2015-2017 academic year diesel technology associate degree and diploma graduates who reported they are employed or are continuing their education within 6 months of graduation from the University of Northwestern Ohio.  There was a 86% response rate to this survey.

**U.S Bureau of Labor Statistics, Occupational Employment and Wages, May 2018,, viewed June 2019