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Field Service Mechanic (Utility Trucks, Diesel, Cranes)

Custom Truck One Source
Humble, TX Full Time
POSTED ON 7/17/2026
AVAILABLE BEFORE 8/22/2026
Custom Truck One Source (CTOS) 18725 McKay Drive Humble, TX 77338

30 year industry leader with 40 locations, 2,500 employees, and a 10,000 unit fleet supporting utility, telecom, rail, construction industries and more.

We are hiring a Field Service Mechanic. CTOS supplies a fully equipped utility truck, including a crane, welder, and compressor. Qualified candidates must have tools, a valid driver’s license, a good driving record, and be willing to work overtime and travel as needed.

  • Serve as the field expert diagnosing and repairing specialized utility equipment
  • Work on bucket trucks, digger derricks, cranes, service trucks, and related equipment
  • Diagnose, repair, and maintain aerial, construction, and light/heavy-duty truck systems
  • Perform inspections, troubleshooting, parts replacement, and repairs on rental, customer, and company units.

Summary:

Primary responsibility is to perform vehicle troubleshooting, repair and maintenance work on chassis and track mounted aerials, digger derricks, cranes, high rail, and other equipment, in accordance with dealer and factory standards, in the field.

Essential Duties and Responsibilities:

  • Reports to Service Manager, who will provide brief description of issues and supporting information related to the vehicle.
  • Read and interpret equipment manuals and repair orders/instructions to perform required maintenance and service. (Must have the ability to utilize laptop, etc. to be able to access needed information and perform diagnostic tests.)
  • Performs work as outlined in work instructions set forth by Service Manager; efficiently, accurately, and in accordance with Custom Truck One Source standards.
  • Diagnosis and repair LMI Diagnostics (Load Moment Indicator) and CAN bus (Controller Area Network)
  • Experience troubleshooting and repair of Utility trucks & Equipment including electrical and hydraulics.
  • Inspects and services vehicles and makes repairs and adjustments both at the service center and in the field.
  • Verify work performed, road test vehicles as necessary.
  • Prepare inspection reports, repair orders (recording service time and parts costs) and timecards completely and accurately.
  • Tag all warranty and core parts for return.
  • Advises management immediately if additional work is needed, if work outlined is not needed, or if repairs cannot be completed within the time promised.
  • Attends CTOS safety training and follows all safety requirements.
  • Attends CTOS and factory -sponsored training classes.
  • Understand and follow federal, state and local regulations such as those governing the disposal of hazardous wastes.
  • Communicate easily with customers and internal departments to ensure minimal equipment downtime.
  • Flexibility to travel beyond the area of coverage, based on business need.
  • Work closely with Service Manager to grow and improve customer satisfaction.
  • Additional duties or responsibilities as designated by the Service Manager.

Preferred Skills:

  • Electrical, schematic / blueprints, hydraulic, welding, and related experience
  • Experience with Quick Serve, DTNA, or related diagnostic software.
  • DOT, ANSI, and Dielectric testing desired

Requirements:

  • High School diploma or GED.
  • Five years of related experience. (Shop Tech and Field Tech)
  • Must hold a valid driver’s license. (CDL Class B preferred.)
  • Must have your own tools.
  • Proficient in documentation using software, meeting deadlines and schedules.

Mental/Physical Requirements:

  • Ability to regularly work in outside weather conditions, including wet and/or humid conditions. The employee is occasionally exposed to extreme cold, and extreme heat. The noise level in the work environment is usually moderate to loud.
  • Positive attitude, professionalism, Punctual attendance.
  • Physical capability for lifting, carrying, pushing, and pulling.
  • The ability to bend, stoop, and lift, up to 50 lbs.
  • Comfort with heights and manual labor.
  • Manual dexterity for operating tools and equipment.

Benefits:

  • 401(k) with Employer Match
  • Competitive Health Care including Dental, Vision, and Life Insurance
  • Company paid health and wellness programs
  • Paid Vacation, Sick and Holidays
  • STD/LTD
  • Partner Discounts (Tool Discount Programs)
  • Investment in Employee Development

Custom Truck One Source is an Equal Opportunity Employer and provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.

Please note that we do not offer sponsorship for work authorization. Only candidates authorized to work in United States without the need for sponsorship will be considered for this position.

Salary.com Estimation for Field Service Mechanic (Utility Trucks, Diesel, Cranes) in Humble, TX
$56,295 to $72,760
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