Diesel Mechanic Jobs in Tucson, AZ
Tucson sits on Interstate 10 between the Port of Tucson and the Mariposa border crossing at Nogales, which means a steady river of Class 8 trucks, transit buses, and mining equipment that all need diesel techs nearby. Sun Tran's transit fleet, Cummins' local service operation, Empire Cat's heavy-equipment shop, and Rush Truck Centers all run Tucson bays - and several post starting diesel pay near $28 an hour with overtime on top.
Current Diesel Mechanic Openings in Tucson, AZ
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Top Tucson Employers Hiring Diesel Mechanics
Diesel work in Tucson splits between over-the-road trucking, transit and municipal fleets, and the heavy iron that serves the region's mines. These employers hire diesel techs regularly:
- Sun Tran - Tucson's public transit agency runs a large bus fleet and posts diesel mechanic roles with a published scale starting around $28 per hour and climbing each contract year.
- Cummins Inc. - the engine maker's Tucson distribution and service operation hires diesel technicians for shop and field work on its engines and generators.
- Empire Cat (Empire Southwest) - the Caterpillar dealer hires heavy-equipment and diesel techs to support construction and the mining operations south and east of the city.
- Rush Truck Centers - the national commercial-truck dealer network runs a Tucson location overhauling engines and full Class 6-8 trucks.
- Penske Truck Leasing - lease and rental fleet maintenance with structured technician levels and certification pay.
- City of Tucson General Services - heavy-truck and equipment mechanics maintaining the municipal fleet, with public-sector benefits and pensions.
Diesel Mechanic Salaries in Tucson
- Entry / apprentice diesel tech: about $20 - $25 per hour
- Experienced fleet or truck technician: roughly $28 - $35 per hour (Sun Tran's published scale tops around $31, with transit and municipal roles adding overtime)
- Master / heavy-equipment or mobile field specialist: about $36 - $48 per hour, higher with a CDL and field-service pay
These are estimates that vary by employer, certification, and experience. Mobile and field-service roles, mining-equipment work, and overtime push the top end well past the dealership average. Most full-time diesel jobs include medical, retirement, tool allowances, and paid ASE certification.
How to Become a Diesel Mechanic in Tucson
Arizona does not license diesel mechanics, so training and certification are what get you hired. Pima Community College's new Automotive Technology and Innovation Center added dedicated diesel bays, and its Automotive Technology program covers the engine, electrical, and hydraulic fundamentals diesel work demands. Many techs also enter through fleet apprenticeships at Sun Tran, the City of Tucson, or trucking terminals along I-10. The key credential is ASE certification in the Medium/Heavy Truck (T-series) areas, and a Class A or B CDL is frequently preferred so you can road-test the trucks you repair.
What the Job Involves
A diesel mechanic diagnoses and repairs the engines, transmissions, brakes, and hydraulic and electrical systems on trucks, buses, and heavy equipment. Days mix preventive-maintenance inspections (DOT-required on commercial fleets), engine and aftertreatment diagnostics, and component overhauls. Field and mobile techs drive a service truck to roadside or jobsite breakdowns, often in Tucson's summer heat, where keeping a fleet running is the whole job.
Skills Employers Look For
- Engine, drivetrain, and aftertreatment (emissions) diagnostics
- Hydraulic, pneumatic, and heavy electrical systems knowledge
- ASE Medium/Heavy Truck (T-series) certifications
- A CDL (or the ability to obtain one) and a clean driving record
- Own hand tools and the stamina for heavy lifting and field work
Career Path & Advancement
Diesel techs typically start on preventive maintenance and brake work, then move into engine and transmission diagnostics as they certify. From there the ladder runs to lead technician, shop foreman, and fleet maintenance supervisor - or into high-paying mobile field-service and mining-equipment roles with Empire Cat and the contractors serving Freeport-McMoRan and other regional mines. Some move to fleet management or open independent truck-repair shops.
Related Careers in Tucson
Diesel skills overlap with light-vehicle repair, driving, and aircraft maintenance:
- Automotive Technician Jobs in Tucson, AZ
- Transmission Technician Jobs in Tucson, AZ
- Trucking and Transportation Jobs in Tucson, AZ
- Aircraft Mechanic Jobs in Tucson, AZ
Frequently Asked Questions
Do you need a CDL to be a diesel mechanic in Tucson?
Not always, but many Tucson employers prefer or require one. A Class A or B CDL lets you legally road-test the trucks and buses you repair, which is why transit agencies like Sun Tran and trucking terminals along I-10 list it as a plus or a requirement. Several shops will help you earn it after hiring.
How long does it take to become a diesel mechanic in Tucson?
A focused diesel or automotive program at Pima Community College runs from a few months for a certificate to about two years for an AAS degree. ASE Medium/Heavy Truck certification requires passing the exams plus two years of work experience, so most techs reach strong certification within two to three years, often faster through a fleet apprenticeship.
What is the night-shift or overtime pay like for Tucson fleet mechanics?
Transit and municipal fleets like Sun Tran and the City of Tucson run multiple shifts and pay overtime above 40 hours, with shift differentials for nights. Because breakdowns do not wait for daytime, fleet and mobile diesel roles tend to offer the most overtime in the local market, which is a major driver of total pay.
Which Tucson employers pay diesel mechanics the most?
Heavy-equipment and mining-support roles with Empire Cat and mine contractors generally sit at the top, especially mobile field-service positions that add a CDL premium and travel pay. Established truck dealers like Rush and lease fleets like Penske offer structured certification raises, while transit and city jobs trade slightly lower hourly rates for strong benefits and pensions.
Can you work on diesel and gas vehicles with the same training?
Largely, yes - the fundamentals overlap, and Pima's program covers both. But diesel adds high-pressure fuel systems, turbocharging, aftertreatment emissions, and heavier hydraulics, so the T-series ASE certifications and hands-on heavy-truck experience are what separate a diesel specialist from a general auto technician in Tucson's fleet shops.
Ready to turn wrenches on the big rigs? Browse all current diesel mechanic openings in Tucson, AZ and apply today.