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Diesel Assistant Jobs in Arizona (NOW HIRING)

UR Work

Diesel Mechanic - Experienced

Tucson, AZ · On-site

$54 - $78/hr

As a Diesel Mechanic - Experienced (Service Tech IV), you'll use your skills to perform maintenance ... manner * Assist in the training of lower level technicians as needed * Maintain paperwork ...

New

United Rentals

Diesel Mechanic - Experienced

Tucson, AZ · On-site

$23.75 - $31.25/hr

As a Diesel Mechanic - Experienced (Service Tech IV), you'll use your skills to perform maintenance ... manner * Assist in the training of lower level technicians as needed * Maintain paperwork ...

United Rentals

Diesel Mechanic - Experienced

Phoenix, AZ · On-site

$24 - $31.50/hr

As a Diesel Mechanic - Experienced (Service Tech IV), you'll use your skills to perform maintenance ... manner * Assist in the training of lower level technicians as needed * Maintain paperwork ...

United Rentals

Diesel Mechanic - Experienced

Phoenix, AZ · On-site

$24 - $31.50/hr

As a Diesel Mechanic - Experienced (Service Tech IV), you'll use your skills to perform maintenance ... Assist in the training of lower level technicians as needed Maintain paperwork/electronic ...

United Rentals

Diesel Mechanic - Experienced

Phoenix, AZ

$24.75 - $32.75/hr

As a Diesel Mechanic - Experienced (Service Tech IV), you'll use your skills to perform maintenance ... manner * Assist in the training of lower level technicians as needed * Maintain paperwork ...

United Rentals

Diesel Mechanic - Experienced

Tucson, AZ

$23.75 - $31.25/hr

As a Diesel Mechanic - Experienced (Service Tech IV), you'll use your skills to perform maintenance ... manner * Assist in the training of lower level technicians as needed * Maintain paperwork ...

United Rentals

Diesel Mechanic - Experienced

Tucson, AZ · On-site

$21.50 - $28.25/hr

As a Diesel Mechanic - Experienced (Service Tech IV), you'll use your skills to perform maintenance ... Assist in the training of lower level technicians as needed Maintain paperwork/electronic ...

Love's Travel Stops

Diesel Technician

Joseph City, AZ · On-site

Hiring Immediately   Welcome to Love's! Diesel Technicians work in a fast-paced environment and ... C, or engine components * Assist customers with roadside services * Provide preventative ...

New

Love's Travel Stops

Diesel Technician

Joseph City, AZ · On-site

Hiring Immediately   Welcome to Love's! Diesel Technicians work in a fast-paced environment and ... C, or engine components * Assist customers with roadside services * Provide preventative ...

New

Love's Travel Stops

Diesel Technician

Joseph City, AZ · On-site

Hiring Immediately   Welcome to Love's! Diesel Technicians work in a fast-paced environment and ... C, or engine components * Assist customers with roadside services * Provide preventative ...

New

Love's Travel Stops

Diesel Technician

Joseph City, AZ · On-site

Hiring Immediately   Welcome to Love's! Diesel Technicians work in a fast-paced environment and ... C, or engine components * Assist customers with roadside services * Provide preventative ...

New

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Diesel Assistant information

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 Arizona?

The most popular types of Diesel jobs in Arizona are:

What cities in Arizona are hiring for Diesel Assistant jobs?

Cities in Arizona with the most Diesel Assistant job openings:

Diesel Assistant jobs near you
Infographic showing various Diesel Assistant job openings in Arizona as of August 2026, with employment types broken down into 2% As Needed, 76% Full Time, 18% Part Time, 2% Temporary, and 2% Contract. Highlights an 98% Physical, 1% Hybrid, and 1% Remote job distribution.

Diesel Mechanic - Experienced

UR Work

Tucson, AZ • On-site

$54 - $78/hr

Other

PTO

Posted 3 days ago

New

Job description

Great company. Great people. Great opportunities.

If you'd like the chance to make your mark with the world's largest equipment rental provider, come build your future with United Rentals!

As a Diesel Mechanic - Experienced (Service Tech IV), you'll use your skills to perform maintenance and repairs of complex equipment with limited or no supervision in a highly skilled, safe, and professional manner. Every day, you can improve and challenge yourself, and if you have the desire and ambition, you'll have the potential to work towards leadership roles in our Service Department. Like every member of our team, we will rely on you to provide exceptional customer service to our customers.

What you'll do:
  • Maintenance and repair of complex mechanical, electrical, hydraulic, and diesel systems on a variety of rental and customer equipment and tools while using a high degree of independent judgment
  • When required, travel to customer job sites for repair/maintenance of rental or customer owned equipment; must maintain service vehicle in a clean and professional manner
  • Assist in the training of lower level technicians as needed
  • Maintain paperwork/electronic documentation of work performed (work orders) in a complete and timely manner on a daily basis
  • Assist with pick-up and delivery of equipment & parts
  • Other duties assigned as needed
Requirements:
  • High School diploma or equivalent
  • Valid driver's license with acceptable driving record
  • 5+ years of experience repairing/maintaining equipment and tools
  • Advanced mechanical aptitude and working knowledge of tools
  • Extensive knowledge of construction equipment with an advanced understanding of schematics and diagrams
  • Must own tools applicable to position
  • Superior customer service, teamwork and verbal/written communication skills
  • Ability to frequently lift items up to 45 lbs.

This position is deemed Safety Sensitive for purposes of United Rentals' policies and procedures.

Why join us?

We don't just "talk the talk!" We're an award-winning company (recently named a Glassdoor Best Place to Work in 2026) that truly cares about our people - That's why we offer best-in-class benefits and perks that will support you and your family. In addition to our health and financial plans, we also offer:

  • Paid Parental Leave
  • United Compassion Fund (http://jobs.unitedrentals.com/creative/culture)
  • Employee Discount Program
  • Career Development & Promotional Opportunities
  • Additional Vacation Buy Up Program (US Only)
  • Early Wage Access through Payactiv (US Hourly Only)
  • Paid Sick Leave
  • An inclusive and welcoming culture (https://jobs.unitedrentals.com/about-us/inclusion)

Explore our comprehensive U.S. benefit offerings (http://unitedrentalsbenefits.com/)

For Canadian benefits, click here (https://unitedrentalsbenefitscanada.com/)

United Rentals, Inc. is an Equal Opportunity Employer and makes employment decisions regardless of race, color, religion, sex, national origin, age, genetic information, citizenship status, veteran status, sexual orientation, gender identity, disability, or any other status protected by law. If you need a reasonable accommodation at any point of the application process, please email careers@ur.com for assistance.

At United Rentals, we proudly hire active duty members, veterans, reservists, and their families. The values that define your service- leadership, discipline, integrity, and teamwork- are the same values that drive our success. With many veterans already part of our team, we're ready to help you transition into a rewarding career.

United Rentals consists of a wide variety of roles with different duties and responsibilities. The actual pay rate offered to candidates varies depending upon a wide range of factors including specific position, location, education, training, experience, skills, and ability.

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