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Heavy-Duty Truck Assembler - Up-Fitter

Interstate Companies, Inc.
Marshfield, WI Full Time
POSTED ON 4/9/2026
AVAILABLE BEFORE 5/7/2026
Job Title: Heavy Duty Truck Assembler and Up-Fitter

Location: Marshfield, Wisconsin

Company: Interstate Assembly Systems

Shift: First Shift Monday – Friday, 6:00am - 2:00pm – Every Saturday, and Sunday off!!

Job Overview

Heavy Duty Truck Assemblers and Up-Fitters are skilled technicians responsible for assembling, modifying, and customizing heavy-duty trucks and their components to meet specific customer or operational requirements. This role involves working with mechanical, electrical, and hydraulic systems, ensuring quality standards, and adhering to safety protocols in a manufacturing or workshop environment.

Key Responsibilities

  • Assembly: Install and assemble major truck components such as cranes, axles, and smaller chassis components (toolboxes, chock holders, cone holders, etc.) using hand tools, power tools, and specialized equipment.
  • Up-Fitting: Customize trucks by adding specialized equipment or features, such as PTO, hydraulic systems, toolboxes, or custom bodies (e.g., dump beds, flatbeds), based on blueprints, schematics, or customer specifications.
  • Wiring and Electrical: Install and connect electrical wiring, and control systems for lights, sensors, and auxiliary equipment.
  • Quality Control: Inspect completed work to ensure functionality, safety, and compliance with manufacturer standards and regulatory requirements (e.g., DOT regulations).
  • Troubleshooting: Diagnose and resolve mechanical, electrical, or hydraulic issues during assembly or up-fitting processes.
  • Documentation: Record parts used, labor time, and modifications made for inventory and customer records.
  • Safety Compliance: Follow workplace safety guidelines, including proper use of personal protective equipment (PPE) and adherence to OSHA standards.
  • Collaboration: Work closely with engineers, designers, and other team members to execute complex builds or modifications efficiently.

Qualifications And Skills

  • Experience: Prior experience in automotive or heavy equipment assembly, mechanics, or a related field (1-3 years preferred).
  • Technical Skills: Proficiency with tools (e.g., wrenches, drills, welders) and ability to read blueprints, technical diagrams, and electrical schematics.
  • Mechanical Aptitude: Strong understanding of heavy-duty vehicle systems, including hydraulics and pneumatics.
  • Physical Requirements: Ability to lift heavy parts (up to 50-75 lbs), stand for extended periods, and work in various positions (e.g., bending, kneeling).
  • Certifications: Welding certification, CDL (Commercial Driver’s License), or ASE (Automotive Service Excellence) certifications are a plus but not always required.
  • Attention to Detail: Precision in aligning parts and ensuring all modifications meet quality and safety standards.
  • Teamwork: Ability to collaborate effectively in a fast-paced production environment.

Position Requirements

  • High school diploma or equivalent
  • Be able to work with diagnostic computers for troubleshooting and repairs
  • Must have your own set of general tools
  • Use computers for web-based training and work order system
  • Must be physically able to lift and work with no restrictions.

Employee Benefits

  • Competitive Wages – Be paid your worth!
  • Uniforms - fully supplied by Interstate!
  • Tool program - available
  • Tuition assistance - for educational and ongoing career growth
  • Health, dental and vision coverage - begins on the first day of the following month.
  • Paid Time Off - (PTO) starts accruing day one of your full-time employment.
  • Holidays - 6 Holidays and 2 Floating Holidays per year
  • 401(K) - with company matching.
  • Long Term Disability - Supplied
  • Short Term Disability - Supplied
  • Life Insurance - Supplied
  • Healthiest You - Virtual Health Care paid by Interstate.
  • PPE Reimbursement- Safety Glasses and Safety Boot Reimbursement
  • Pet Insurance – We care about our furry friends!
  • Employee Discounts - available on products and services
  • Paid Employee Assistance Program - Free 24/7 Access to a guidance consultant regarding life challenges you or family member may face.
  • Paid Health and Well-being screening - for employees and their spouse

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.

Interstate Companies is an Equal Opportunity Employer, and we encourage all qualified and interested persons to apply for this position by submitting a resume for consideration.

Military Friendly Hiring.

#CDRXP

Salary.com Estimation for Heavy-Duty Truck Assembler - Up-Fitter in Marshfield, WI
$42,099 to $54,098
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