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Diesel Assistant Jobs in Seattle, WA (NOW HIRING)

RWC Group

Diesel Technician- Entry Level !

Seattle, WA · On-site

Learn diesel diagnostics, maintenance, and repair from experienced technicians. * Assist with preventative maintenance, inspections, and mechanical repairs. * Perform routine services such as oil ...

RWC Group

Diesel Technician - Master !

Seattle, WA · On-site

$35/hr

Mentor and assist apprentice and entry-level technicians with diagnostics, repair procedures, and ... Minimum of 5 years of diesel truck repair experience or equivalent combination of education and ...

Xylem

Field Service Diesel Mechanic

Kent, WA · On-site

$34/hr

Rebuild diesel engines and pump ends. * Assist customer and/or Xylem personnel with setting up pumping systems on customer job sites as needed. Assist in the performance of start-up duties and ensure ...

RWC Group - Everett

Technician Journeyman !

Everett, WA · On-site

$35/hr

RWC Group is seeking a skilled and experienced Journeyman Diesel Technician to diagnose, repair ... Mentor and assist apprentice and entry-level technicians with diagnostics, repair procedures, and ...

RWC Group

Technician Journeyman !

Everett, WA · On-site

$35/hr

RWC Group is seeking a skilled and experienced Journeyman Diesel Technician to diagnose, repair ... Mentor and assist apprentice and entry-level technicians with diagnostics, repair procedures, and ...

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All JobsDiesel JobsDiesel Assistant JobsDiesel Assistant Jobs in Seattle, WA

Diesel Assistant information

See Seattle, WA salary details

$33K

$55.1K

$79.1K

How much do diesel assistant jobs pay per year?

As of Aug 26, 2026, the average yearly pay for diesel assistant in Seattle, WA is $55,076.00, according to ZipRecruiter salary data. Most workers in this role earn between $47,800.00 and $55,200.00 per year, depending on experience, location, and employer.

What is a diesel assistant?

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 skills and qualifications are needed to be a diesel assistant?

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 challenges do 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 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 are the most commonly searched types of Diesel jobs in Seattle, WA?

The most popular types of Diesel jobs in Seattle, WA are:

What cities near Seattle, WA are hiring for Diesel Assistant jobs?

Cities near Seattle, WA with the most Diesel Assistant job openings:

Diesel Assistant jobs near you
Infographic showing various Diesel Assistant job openings in Seattle, WA as of August 2026, with employment types broken down into 1% As Needed, 75% Full Time, 19% Part Time, 1% Temporary, and 4% Contract. Highlights an 97% Physical, 1% Hybrid, and 2% Remote job distribution, with an average salary of $55,076 per year, or $26.5 per hour.

Apprentice Diesel Technician

Dobbs Peterbilt

Seattle, WA • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 5 days ago

Dobbs Peterbilt rating

8.2

Company rating: 8.2 out of 10

Based on 7 frontline employees who took The Breakroom Quiz

23rd of 155 rated car dealerships

Job description

IntroductionAt Dobbs Truck Group, a part of our mission is to create relationships and a healthy work environment for our employees. We are always looking for qualified, customer-oriented individuals at Dobbs Truck Group.

Overview

Jumpstart Your Career with Dobbs Truck Group

Hands-on training. Real career growth. Start your diesel technician career today.

Dobbs Truck Group operates 24 commercial truck dealerships through Dobbs Peterbilt and Western Truck Center across multiple states. We represent leading brands including Peterbilt, Volvo, Mack, Autocar, and Hino, and are committed to building a high-quality team and long-term careers.

Why Join Dobbs Truck Group

  • Career Growth: OEM training 
  • Health Benefits: Medical, Dental, Vision, HSA, Life & Disability coverage
  • Pay & Rewards: Competitive pay, performance bonuses, boot allowance
  • Future Focus: 401(k) with company match + financial planning resources
  • Work-Life Balance: Paid holidays, vacation, and support programs

Additional benefits may be available based on role and eligibility.

About the Role

The Apprentice Diesel Technician is an entry-level role focused on developing the skills needed to become a fully qualified Diesel Technician.

You’ll gain hands-on experience working on heavy-duty trucks while learning directly from experienced technicians. This role is designed to grow into a Diesel Technician position within 1–2 years.

Responsibilities

Maintenance & Repairs

  • Perform routine maintenance (lubrication, filters, belts, hoses).
  • Assist with engine, brake, and drivetrain repairs.
  • Support basic electrical work (batteries, lights, starters, alternators).

Inspection & Support

  • Inspect vehicles and report findings to senior technicians.
  • Assist with diagnostics and troubleshooting.

Shop Responsibilities

  • Follow shop procedures and safety standards.
  • Maintain a clean and organized work area.
  • Accurately document work performed.

Requirements

  • 0–2 years of mechanical experience or trade/technical school training.
  • High school diploma or GED.
  • Basic tool set (minimum requirements apply).
  • Strong work ethic and willingness to learn.
  • Ability to work in a team environment.

Work Environment

This is a hands-on shop role that includes:

  • Working with heavy equipment and mechanical systems.
  • Frequent standing, lifting 50+ pounds, and physical activity.
  • Exposure to noise, heat, and shop conditions.

Career Growth

We invest in our technicians and promote from within:

Apprentice -->Diesel Technician 1-3 --> Journeyman Technician 1-2

What Dobbs Peterbilt employees say

Pay

Hours and flexibility

Workplace

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