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 Field Diesel Mechanic (Service Tech IV - Field Service), 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
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.

Field Service Tech IV – Utility Truck Road Service

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!

United Rentals Commercial and Utility Trucks is seeking a skilled and dedicated Road Service Utility Truck Mechanic to join our fleet maintenance team. If you are a seasoned heavy-duty mechanic with expertise in buckets, pulling and stringing, diesel, and hydraulic systems and have a commitment to safety and quality, we want to talk to you. You'll be responsible for ensuring our fleet of utility and service vehicles is maintained to the highest standards, playing a critical role in keeping our operations running smoothly.

What you’ll do:

Perform inspections, diagnostics, and repairs on a wide variety of diesel and gasoline-powered vehicles and heavy equipment, such as dump trucks, bucket trucks, and specialty utility vehicles.
Troubleshoot and repair complex issues within hydraulic, electrical, pneumatic, and braking systems.
Conduct routine preventive maintenance, including oil changes, tire service, and lubrication, to maximize fleet longevity and performance.
Utilize diagnostic software and technical manuals to identify malfunctions and determine the best course of action.
Perform welding and fabrication for equipment repair and modification as needed.
Maintain accurate and timely service records, repair logs, and documentation.
Ensure all work complies with federal, state, and company safety standards and procedures.
Perform annual DOT and Dielectric testing on insulated equipment.
Other duties as assigned

Requirements:

High school diploma or equivalent
5+ years of experience as a heavy-duty diesel or truck mechanic, with hands-on experience on buckets, and hydraulic systems
Valid Commercial Driver's License (CDL) with relevant endorsements is required or must be obtained
Experience with a wide range of utility equipment is a plus, including cranes, pulling and stringing equipment and dielectric testing equipment
Strong troubleshooting and problem-solving skills
Excellent communication skills and the ability to work independently or as a team
Commitment to maintaining a safe and organized work environment
Will require some overnight travel to projects further away
Company service vehicle, phone, laptop and any other needed tools for the job will be supplied by United Rentals

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
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

Explore our comprehensive U.S. benefit offerings

For Canadian benefits, click here

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.

Heavy Equipment Mechanic Jobs in San Antonio, TX

Field Diesel Mechanic

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