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Heavy Duty Diesel Mechanic

STS Technical Services
Appleton, WI Full Time
POSTED ON 12/16/2025 CLOSED ON 2/16/2026

What are the responsibilities and job description for the Heavy Duty Diesel Mechanic position at STS Technical Services?

Summary:

STS Technical Services is actively seeking candidates for a Mechanic II role with our Fortune 500 Client! In this role, you’ll need to be qualified in heavy and medium truck mechanics. Air conditioning certification is preferred.

 

Duties and Responsibilities:

  • Assemble and/or install a variety of major and minor subassemblies, parts and systems as directed. Typical parts are brackets, wiring, radiators, axles, air systems, hydraulic steering and lines, air lines, electronic lines, valves, tanks, brackets, linkages, etc.
  • Cut, fit, bend and adjust parts for fit or function as directed
  • Drill, ream or tap holes for mounting or clearance as directed
  • Measure wire, tubing or hose paths and cut tubing to length as directed
  • Fill batteries and accessory grease points and apply sealants as directed
  • Start up engine, check dashboard instruments for proper function
  • Assemblies weigh up to 10,000 lbs., handle with appropriate equipment, such as cranes, dollies etc. which are provided
  • Install various aftermarket parts and assemblies on truck such as brackets, wiring, hydraulic lines, air lines, etc.
  • Ability to follow work instructions and quality standards
  • Ability to follow engineering prints and bill of materials
  • Perform repairs/alterations on vehicles such as drilling holes or modify sheet medal
  • Install various harnesses and batteries
  • Requires the use of simple arithmetic and some measuring instruments such as caliper or scale
  • Diagnose and/or repair problems and provide failure analysis on a follow-up service report on all areas of responsibility
  • Perform other duties as assigned

Basic Qualifications:

  • High School Diploma or equivalent
  • Minimum of 3-5 years of experience in the Automotive Field Service and/or Automotive Technical Support areas (extensive mechanical experience)
  • Prior experience using pneumatic hand tools, drill, and truck parts
  • Ability to read Technical Manuals and blueprints and follow work instructions
  •  

 

Interested in this role? Click “Apply” or contact one of our recruiters at (800) 447-0515 x3910! We look forward to hearing from you!

 

Salary.com Estimation for Heavy Duty Diesel Mechanic in Appleton, WI
$52,732 to $67,115
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