Fleet Diesel Diagnostics & Repair Specialist
Zum
St. Louis, MO, USA
Posted on Apr 3, 2026
Role Snapshot
Be the go-to expert for pinpointing faults, executing quality repairs, and keeping commercial vehicles road-ready. You’ll combine technical precision with strong documentation and strict adherence to regulatory and company standards.
What You’ll Tackle Diagnostics & Repair
Be the go-to expert for pinpointing faults, executing quality repairs, and keeping commercial vehicles road-ready. You’ll combine technical precision with strong documentation and strict adherence to regulatory and company standards.
What You’ll Tackle Diagnostics & Repair
- Diagnose and fix issues across: steering, electrical, cooling, lubrication, braking, drivetrains, suspensions, power steering units, clutches, transmissions, and oil/temperature/fuel regulation components—within your qualification level and applicable regulations.
- Support Tech I teammates on engine, transmission, and differential rebuilds as assigned.
- Perform test drives during Preventative Maintenance to validate driver concerns and post-repair to verify results.
- Arrange required inspections and secure approvals for all major repairs before a vehicle leaves the shop.
- Identify and report additional maintenance needs, including those needing a higher-qualification technician.
- Complete assigned tasks under the direction of a manager or lead.
- Document labor time, parts consumption, and all work performed on designated forms.
- Respond to road calls and conduct on-the-road repairs as assigned.
- Maintain a safe, clean, efficient workspace compliant with federal, state/provincial, and local requirements and company housekeeping/safety policies.
- Alert the Lead Technician to any unsafe maintenance conditions or vehicle abuse.
- Support AM/PM coverage and overtime as needed.
- 2–4 years of medium/heavy truck fleet mechanic experience.
- Advanced diagnostic ability; strong electrical and A/C skill set.
- Comprehensive knowledge of major vehicle systems and diesel equipment.
- Previous fleet exposure with diesel and gasoline platforms.
- Personal set of recommended hand tools for Medium & Heavy Duty diesel work.
- Demonstrated judgment and solid decision-making.
- Valid CDL (or ability to secure within 90 days of employment).
- ASE certifications in brakes, suspension, engine, electrical, and A/C—or Master School Bus/Master Truck Technician.