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Diesel Assistant Jobs in Wisconsin (NOW HIRING)

Istate Truck Center

Entry Level Diesel Mechanic

Windsor, WI

$25.25 - $33.25/hr

Perform routine inspections, oil changes, and preventive maintenance on diesel engines, transmissions, brakes, and electrical systems. * Assist senior technicians with diagnostics using tools such as ...

Jerry's Towing

Diesel Mechanic

Roberts, WI

$35/hr

Keep the shop, tools, and work areas clean, organized, and safe. Assist with emergency repairs or ... Knowledge of diesel engines, brakes, hydraulics, electrical systems, suspension, and drivetrain ...

Istate Truck Center

Entry Level Diesel Mechanic

Windsor, WI · On-site

$25.25 - $33.25/hr

Perform routine inspections, oil changes, and preventive maintenance on diesel engines, transmissions, brakes, and electrical systems. * Assist senior technicians with diagnostics using tools such as ...

Istate Truck Center

Entry Level Diesel Mechanic

Windsor, WI

$25.25 - $33.25/hr

Perform routine inspections, oil changes, and preventive maintenance on diesel engines, transmissions, brakes, and electrical systems. * Assist senior technicians with diagnostics using tools such as ...

GFL Environmental

Diesel Mechanic

Pembine, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Thorp, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Niagara, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Florence, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Florence, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Fence, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Pembine, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Mukwonago, WI · On-site

$25 - $40/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Viroqua, WI · On-site

$22.75 - $30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Thorp, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Fence, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Thorp, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Niagara, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Hager City, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

GFL Environmental

Diesel Mechanic

Plum City, WI · On-site

$30/hr

Collaboration & Training: Assist in reviewing mechanical write-ups on equipment, coordinate repair ... Minimum of one (1) year of experience working as a diesel mechanic. * Technical Skills: Computer ...

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Diesel Assistant information

What qualifications do I need to be a diesel tech?

To become a diesel technician, you typically need a high school diploma or equivalent, along with technical training from a vocational school or community college. Certification from organizations like the National Institute for Automotive Service Excellence (ASE) can improve job prospects, and hands-on experience with diesel engines and tools is essential.

What are the key skills and qualifications needed to thrive as a Diesel Assistant, and why are they important?

To thrive as a Diesel Assistant, you need foundational mechanical knowledge, basic diesel engine repair skills, and often a high school diploma or equivalent. Familiarity with diagnostic tools, hand and power tools, and safety protocols is essential, and some employers may require completion of a diesel technology training program. Strong attention to detail, a willingness to learn, and effective teamwork are valuable soft skills in this role. These capabilities ensure safe, efficient maintenance of diesel equipment and contribute to the smooth operation of fleet or repair shop environments.

What is the difference between Diesel Assistant vs Diesel Mechanic?

AspectDiesel AssistantDiesel Mechanic
CertificationsBasic automotive or diesel engine training, possibly a CDLASE certification in diesel engines, technical diploma
Work EnvironmentAssist with maintenance, inspections, and basic repairs in garages or fleet settingsPerform complex repairs, diagnostics, and engine overhauls in repair shops or on-site
Job ResponsibilitiesSupport mechanics, perform routine tasks, and assist with partsDiagnose issues, repair engines, and perform detailed maintenance

While both roles involve working with diesel engines, a Diesel Assistant primarily supports mechanics with basic tasks and routine maintenance, requiring less certification. A Diesel Mechanic performs advanced repairs and diagnostics, often holding specialized certifications. The roles differ mainly in responsibility level and technical expertise required.

What diesel job pays the most?

The highest-paying diesel jobs typically include diesel service managers, fleet maintenance directors, and specialized heavy equipment mechanics, often earning six-figure salaries. These roles usually require extensive experience, certifications, and strong technical skills, and may involve supervisory responsibilities or working in demanding environments.

What are some common challenges Diesel Assistants face when supporting maintenance teams?

Diesel Assistants often encounter challenges such as working in noisy, fast-paced environments and handling physically demanding tasks like lifting heavy parts or equipment. They may also need to quickly adapt to changing priorities as emergency repairs or breakdowns arise. Collaborating effectively with mechanics and technicians is essential for smooth workflow, and maintaining a strong attention to safety procedures is crucial due to the nature of working with heavy machinery and hazardous materials.

What does a diesel mechanic assistant do?

A diesel mechanic assistant supports diesel mechanics by performing tasks such as inspecting, cleaning, and maintaining diesel engines and related parts. They may assist with repairs, use diagnostic tools, and ensure safety procedures are followed in a workshop or field environment.

Can you make 6 figures as a diesel technician?

Experienced diesel technicians can potentially earn six-figure salaries, especially with specialized skills, certifications, and extensive experience. Factors such as location, employer, and overtime can also influence earning potential in this field.

What are Diesel Assistants?

Diesel Assistants are support personnel who assist with the maintenance, repair, and operation of diesel-powered vehicles and equipment, commonly in railway or transportation sectors. Their duties often include checking and fueling engines, performing routine inspections, assisting mechanics, and ensuring that diesel locomotives or machinery operate efficiently. Diesel Assistants work under the supervision of senior technicians or engineers and play a crucial role in keeping the equipment running smoothly and safely. This position is often entry-level and can serve as a stepping stone to more advanced roles within the diesel maintenance field.
What are the most commonly searched types of Diesel jobs in Wisconsin? The most popular types of Diesel jobs in Wisconsin are:
Diesel Assistant jobs near you
Infographic showing various Diesel Assistant job openings in Wisconsin as of July 2026, with employment types broken down into 1% As Needed, 73% Full Time, 23% Part Time, 1% Temporary, and 2% Contract. Highlights an 98% Physical, 1% Hybrid, and 1% Remote job distribution.

Entry Level Diesel Mechanic

Istate Truck Center

Windsor, WI

$25.25 - $33.25/hr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 23 days ago

I-State Truck Center rating

9.3

Company rating: 9.3 out of 10

Based on 14 frontline employees who took The Breakroom Quiz

2nd of 150 rated car dealerships

Job description

Job Title: Entry-Level Diesel Mechanic
Location: Madison, Wisconsin
Company: I-State Truck Center

I-State Truck Center is a leading provider of heavy-duty truck sales, parts, and service in the Midwest, specializing in Freightliner, Western Star, and Detroit Diesel products. With a commitment to excellence and customer satisfaction, we serve commercial fleets, owner-operators, and businesses across Wisconsin and beyond. Our Madison location offers a dynamic environment for skilled tradespeople to grow their careers.

The ideal candidate will have a strong foundation in diesel engine repair, diagnostics, and maintenance, with a focus on delivering high-quality service to ensure customer satisfaction. This role offers highly competitive wages and opportunities for career growth in a fast-paced work environment.

Job Summary

We are seeking a motivated Entry-Level Diesel Mechanic to join our Madison service team. This role is ideal for a recent graduate from a diesel technology program or someone with 1–2 years of hands-on experience in diesel repair. You’ll work alongside seasoned technicians performing preventive maintenance, diagnostics, and repairs on Class 6–8 trucks and trailers. If you’re eager to apply your foundational skills while continuing to learn advanced techniques, this is an excellent opportunity to build a long-term career in heavy-duty diesel service.

Key Responsibilities

  • Perform routine inspections, oil changes, and preventive maintenance on diesel engines, transmissions, brakes, and electrical systems.
  • Assist senior technicians with diagnostics using tools such as OBD scanners, multimeters, and air gauges.
  • Disassemble, repair, and reassemble components including fuel systems, aftertreatment systems, and suspension components under supervision.
  • Accurately document all work performed using digital service management software.
  • Maintain a clean, organized, and safe work area in compliance with company policies and OSHA standards.
  • Coordinate with the parts department to identify needed components.
  • Participate in on-the-job training and manufacturer certification programs.

Qualifications

Education:

  • High school diploma or equivalent required
  • Technical diploma or certification in automotive, diesel mechanics, or heavy-duty truck repair preferred

Experience:

  • 1–2 years of experience working on light-duty automotive or heavy-duty diesel trucks (Freightliner, Kenworth, Peterbilt, Volvo, Mack, etc.)

Skills:

  • Basic understanding of diesel engine systems, air brakes, and hydraulics
  • Familiarity with OEM diagnostic platforms (Cummins Insite, Detroit Diesel DiagnosticLink, etc.)
  • Ability to read service manuals, wiring diagrams, and schematics
  • Strong attention to detail, problem-solving skills, and safety-first mindset
  • Dependable attendance and team-oriented attitude

Physical Requirements:

  • Ability to lift 50–75 lbs
  • Ability to work in confined spaces and varying shop conditions

Preferred Skills

  • Experience with Freightliner and Detroit Diesel platforms
  • Exposure to diagnostic software such as DiagnosticLink or Jaltest
  • Basic welding or fabrication experience a plus

Employee Benefits

  • Competitive wages – be paid your worth
  • Uniforms provided and cleaned
  • Tool program available
  • Tuition assistance for ongoing education and career growth
  • Medical, dental, and vision coverage starting the first of the month following hire
  • PTO accrual starting day one
  • 6 paid holidays plus 2 floating holidays
  • 401(k) with company match
  • Company-paid short-term and long-term disability
  • Company-paid life insurance
  • Healthiest You virtual healthcare
  • PPE reimbursement (safety glasses and safety boots)
  • Pet insurance
  • Employee discounts on products and services
  • Employee Assistance Program (EAP) – free 24/7 access
  • Paid health and wellness screening

This job description is not intended to be an exhaustive list of duties and may be modified at any time.

Interstate Companies is an Equal Opportunity Employer. All qualified applicants are encouraged to apply.

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