Senior Diesel Technician: Top Diagnostician for HD Trucks

W.W.Williams; West Columbia (SC); On-site; USD 70,000 - 95,000; Full time

Benefits offered by this job

8 Paid Holidays & 1 Paid Wellness Day

Paid Time Off

Employee Referral Bonus Program

Medical, Dental & Vision Insurance

401k with Company Match

Company Paid Training

Job summary

W.W. Williams in West Columbia, SC is seeking two to three Senior Diesel Technicians (Journeyman/Tech 1) for a full-time, day-shift, on-site role. You’ll own the toughest diagnostic jobs on Detroit/Cummins-powered fleet trucks, diagnose, repair, and road test, while mentoring junior technicians.

Expect top-tier pay, OT, and OEM training opportunities. Required: 7+ years on Class 6–8 trucks, ASE Medium/Heavy Truck certs (full T2–T8), Detroit/DTNA, Allison and Cummins certifications,

Qualifications

• 7+ years as a journeyman / Tech 1 on Class 6–8 trucks.
• ASE Medium/Heavy Truck certified (full T2–T8 series).
• OEM certifications: Detroit (DTNA), Allison and/or Cummins.
• Strong electronic diagnostics: DiagnosticLink, Cummins INSITE, Allison DOC, laptop-based troubleshooting.
• Engine, aftertreatment (DPF/SCR), electrical and transmission repair, from diagnosis to road test.
• Own tools and a valid driver’s license (CDL-A a plus).

Responsibilities

• Own the toughest diagnostic jobs on fleet customers’ Detroit, Cummins and Allison-powered trucks.
• Diagnose, repair, road test and document the work.
• Be the go-to tech who helps junior techs get unstuck.

Skills

Journeyman/Tech 1

Heavy trucks Class 6–8

CDL-A license

Diagnostic problem solving

Mentoring junior techs

Tools

DiagnosticLink

Cummins INSITE

Allison DOC

Job description

W.W. Williams in West Columbia, SC is seeking two to three Senior Diesel Technicians (Journeyman/Tech 1) for a full-time, day-shift, on-site role. You’ll own the toughest diagnostic jobs on Detroit/Cummins-powered fleet trucks, diagnose, repair, and road test, while mentoring junior technicians.

Expect top-tier pay, OT, and OEM training opportunities. Required: 7+ years on Class 6–8 trucks, ASE Medium/Heavy Truck certs (full T2–T8), Detroit/DTNA, Allison and Cummins certifications,