LMI​/Bus Field Service Mechanic — Utility Cranes & Trucks

Position: LMI/CAN Bus Field Service Mechanic — Utility Cranes & Trucks
What a day on our utility fleet team looks like

You start your morning in a CTOS utility truck outfitted with a crane, welder, and compressor. Jobs come in from the Service Manager with context, locations, and timelines. You roll out to a customer site, open your laptop to pull up OEM manuals and diagnostic software, and dig into issues on bucket trucks, digger derricks, cranes, service trucks, and other aerial or construction equipment.

By afternoon, you’re road‑testing a repaired unit, documenting time and parts, tagging any core/warranty returns, and coordinating the next stop to reduce downtime for our customers.

Impact you’ll make Serve as the on‑site authority for troubleshooting and repair across aerial devices, construction gear, and light/heavy‑duty truck systems.

Diagnose and resolve LMI (Load Moment Indicator) and CAN bus issues; tackle electrical and hydraulic faults with confidence.

Perform inspections, troubleshooting, component replacement, and repairs on rental, customer, and company equipment—both in the field and at the service center.

Follow CTOS standards and factory/dealer procedures to ensure safe, accurate, and efficient work.

Verify quality via road tests when required and complete precise service reports, timecards, and repair orders.

Stay compliant with federal, state, and local regulations, including proper handling and disposal of hazardous waste.

Collaborate closely with the Service Manager and communicate clearly with customers and internal teams to keep fleets working.

Travel beyond your normal coverage area as business needs dictate; overtime is part of the job when customers need us.

About the role

Your core responsibility is field diagnostics, maintenance, and repair for chassis‑ and track‑mounted aerials, digger derricks, cranes, hi‑rail vehicles, and related utility equipment—delivered to spec and in line with dealer and factory standards.

What you’ll bring

High school diploma or GED.
5+ years of relevant experience as a shop and field technician.

Valid driver’s license (CDL Class B preferred) and the ability to travel as needed.

Own professional tool set.

Comfort using a laptop and software for diagnostics and documentation; able to meet deadlines and schedules.

Preferred strengths

Electrical systems, schematics/blueprints, hydraulics, welding.

Experience with Quick Serve, DTNA, or similar OEM diagnostic platforms.

Knowledge of DOT, ANSI, and dielectric testing.

Working conditions and physical demands

Frequent outdoor work in wet/humid weather; occasional exposure to extreme heat or cold; moderate to loud noise.

Positive, professional demeanor and reliable, punctual attendance.

Ability to lift, carry, push, and pull up to 50 lbs; bend, stoop, and work at heights; manual dexterity to operate tools and equipment.

Why you’ll love it here
401(k) with employer match.

Comprehensive health benefits: medical, dental, vision, life insurance.

Company‑paid health and wellness programs.

Paid vacation, sick time, and holidays.

STD/LTD coverage.

Tool and partner discount programs.

Investment in training and employee development, including CTOS and factory‑sponsored courses and safety training.

Proficiency areas

Hydraulics, diesel engines, and heavy equipment systems.

Electrical diagnostics for heavy equipment.

Crane and lifting equipment, aerial/utility systems.

DOT and equipment inspection compliance.

Equipment you’ll work with Diesel engines and vehicles; after‑treatment systems (DPF, DEF).Cranes, boom trucks, boom cranes, digger derricks.

Service and hi‑rail trucks; PTO-driven systems.

Tools of the jobCTOS provides a fully equipped utility truck (crane, welder, compressor) for field work.

You provide your own tools and the mindset to solve problems wherever the work takes you.

Legal
** 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.
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