Holliday Rock has been in the construction material business for over eighty-eight years and is one of the largest independent producers of aggregate, concrete and asphalt in the United States. A diesel mechanic performs mechanical work at the journeyman mechanic level in repairing, maintaining and testing all types of truck, automotive, on highway, off highway, and ready-mix equipment.Position OverviewThe OTR/HE (Over-the-Road/Heavy Equipment) Repair Technician is responsible for performing skilled mechanical work on a wide range of vehicles and equipment, including trucks, automotive, on-highway, off-highway, and ready-mix equipment. This role includes participation in a 12-week structured training program designed to equip technicians with industry-recognized certifications and hands-on experience to support long-term success in the position.

Key Responsibilities- Perform preventive and corrective maintenance on Class 8 trucks, off-road heavy construction equipment, and ready-mix vehicles.- Diagnose, repair, and test systems including engines, transmissions, hydraulic systems, electrical systems, emission controls, brake systems, and HVAC.- Utilize OEM diagnostic software such as Cummins Insite, CAT ET, Volvo Connect, and Komatsu systems to troubleshoot and resolve equipment issues.- Conduct inspections in compliance with federal and state regulations, including DOT, CalDOT, and BIT programs.- Complete accurate documentation of inspections, repairs, and parts usage in computerized maintenance systems (CMMS).- Work safely in compliance with OSHA, MSHA, and company safety standards.- Collaborate with supervisors, operators, and parts personnel to ensure equipment availability and reliability.Training & DevelopmentThe role begins with a 12-week training program that combines classroom instruction, shop-based learning, and field experience. Training covers:- OSHA and MSHA Safety Training- Preventive Maintenance Scheduling and Federal/State Inspections- Brake System Repair and Bendix Brake Inspection Certification- Air Conditioning, Cooling/Heating, and Exhaust Systems- Hydraulic, Fuel, Transmission, and Suspension Systems- Electrical and Emission Control Systems- Ready-Mix Vehicle Components and Operations- Heavy Equipment Operation and Maintenance (dozers, excavators, loaders, articulated trucks, etc.)- OEM Diagnostic Software Training (Cummins, CAT, Volvo, Komatsu)- Service Truck Deployment and Field OperationsCertifications Earned Upon Completion- 49 CFR 396.19 Inspector Certification- 49 CFR 396.25 Brake Inspection Certification- EPA 608/609 Certification- MSHA Part 46At the end of the program, candidates will possess the skills required to perform preventive and corrective maintenance independently across Holliday Rock’s diverse fleet.Qualifications- High school diploma or equivalent (technical school preferred).- Prior mechanical experience with trucks or heavy equipment is a plus but not required—comprehensive training will be provided.- Basic understanding of tools, equipment, and diagnostic technology.- Ability to lift up to 50 pounds and work in various outdoor and shop environments.- Commitment to working safely and following established procedures.- Strong problem-solving skills and attention to detail.Benefits of Joining Holliday Rock- Paid training program with industry-recognized certifications.- Competitive compensation and benefits package.- Opportunities for long-term career growth within one of the largest independent construction material producers in the U.S.- A culture focused on safety, teamwork, and professional development.