Diesel Mechanic

DCS is a family-owned and operated business that values employees like family. We provide innovative, safe, and high-quality infrastructure and maintenance contracting services to State DOTs, railroads, and commercial/residential customers across the United States. Our team enjoys generous compensation packages, employee engagement events, and career development programs.

About the role

We are seeking a highly skilled Shop/Traveling Diesel Mechanic with extensive troubleshooting experience in medium and heavy-duty truck systems. This role is ideal for a self-sufficient, diagnostic-focused technician who can accurately identify issues and complete repairs efficiently — the first time. This position requires travel throughout Oklahoma, Texas, Louisiana, Kansas, and Colorado. Candidates must be comfortable working independently in the field with minimal supervision. The shop is located in Oklahoma City, OK, and a service truck is provided.

Responsibilities

• Travel between job sites to inspect, diagnose, and repair medium and heavy-duty diesel trucks, skid steers, and related equipment.
• Perform advanced troubleshooting and repair of:
  • Diesel engines
  • Electrical systems
  • Hydraulic systems
  • Emissions systems (aftertreatment/DEF systems)
  • Transmissions
  • A/C systems
  • Hi-Rail gear systems
  • Spray systems
• Utilize scan tools, diagnostic software, multimeters, pressure gauges, and other testing equipment to accurately identify mechanical and electrical failures.
• Perform routine maintenance, emergency repairs, and preventative services.
• Demonstrate strong working knowledge of diesel emissions systems and electrical diagnostics.
• Complete repairs efficiently and correctly on the first attempt through accurate root-cause analysis.
• Perform fabrication, welding, and cutting as required.
• Maintain service truck organization, tool inventory, and parts accountability.
• Maintain accurate service documentation and communicate repair updates with management.
• Ensure full compliance with company safety standards and DOT regulations.
• Work extended hours as needed and operate effectively in all weather conditions.

Requirements

• Minimum 3+ years of experience as a diesel mechanic, preferably with heavy-duty truck repair.
• Diagnostic and troubleshooting skills across diesel, hydraulic, electrical, and emissions systems (REQUIRED).
• Strong understanding of aftertreatment systems and diesel emissions components.
• Proven ability to work independently in remote environments with minimal supervision.
• Fabrication and welding experience required.
• ASE certifications are preferred but not required.
• Valid driver’s license required; must be able to pass a DOT physical.
• Willingness to travel frequently across multiple states (hotel accommodations and per-diem provided by DCS).
• Must provide verifiable employment history and hands-on experience.

Benefits

• Competitive medical, dental, vision, and prescription drug coverage.
• 401(k) with company match.
• Generous paid time off.
• Career development opportunities.
• Employee referral bonus.

Pay

Compensation range: $32–35/hour depending on experience.