Diesel Mechanic at DeAngelo Contracting Services — Choctaw, OK

Service truck provided.

Key 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.
• 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 & Compensation

• Compensation range: $32-35/hourly depending on experience.
• Challenging and rewarding work environment
• Competitive medical, dental, vision, and prescription drug coverage
• 401(k) with company match
• Generous paid time off
• Career development opportunities
• Employee referral bonus