Diesel Mechanic

Holliday Rock Co., Inc; Sun Valley (CA); On-site; USD 47,000 - 52,000; Full time

Benefits offered by this job

Medical Insurance

401(k) Retirement Plan

Paid Holidays

Paid Vacations

Paid Sick time

Employee Assistance Program (EAP)

Job summary

Holliday Rock Co., Inc. seeks a journeyman Diesel Mechanic to inspect, maintain, repair, and overhaul diesel and gasoline vehicles and equipment.

The role covers on‑highway trucks, ready‑mix vehicles, and construction machinery to keep fleet operations compliant with safety and reliability standards. You will diagnose mechanical, hydraulic, and electrical failures, perform tune‑ups, and use OEM software for diagnostics.

Qualifications

• 2–4 years of heavy‑duty diesel equipment maintenance experience.
• High school diploma or equivalent preferred.
• Valid driver’s license; Class A or B preferred.
• Ability to lift up to 50 lbs and perform physical tasks.
• Work in varying environmental conditions including dust and outdoor weather.

Responsibilities

• Complete tune-ups, repairs, and overhauls of diesel engines.
• Repair gasoline engines and transmissions as needed.
• Use OEM software to diagnose engines and transmissions.
• Overhaul and maintain suspension, steering, brakes, and exhaust systems.
• Submit required work orders and report time spent.
• Perform welding on steel and aluminum (Gas, Arc, Mig).
• Make service calls for emergency repairs and towing.

Skills

Diagnostics

Mechanical repair

Electrical systems

Hydraulic systems

Troubleshooting

OEM software

Education

High school diploma or equivalent

Tools

OEM diagnostic software

Job description

• Base Pay $34.00 - $38.00 / Hour

Description

The Diesel Mechanic is responsible for performing journeyman-level mechanical work involving the inspection, maintenance, repair, and overhaul of diesel and gasoline-powered vehicles and equipment. This includes but is not limited to on-highway trucks, ready-mix vehicles, and various construction-related machinery. The role ensures that fleet operations remain in compliance with performance, safety, and reliability standards.

Essential Responsibilities of the Position

• Complete tune-up, repair, and overhaul of diesel engines, including removal and replacement.
• Complete tune-up, repair, and overhaul of gasoline, including removal and replacement.
• Ability to use OEM software to diagnose and repair engines and transmissions.
• Service and adjustment of transmissions.
• Overhaul, maintenance, and adjustments of clutches, drive line components, and differentials.
• Overhaul and maintenance of heavy and light-duty suspension systems, including heavy leaf springs.
• Overhaul, maintenance, and adjustments of power and manual steering systems and components.
• Repair and maintenance of fuel systems and related components, both diesel and gas.
• Repair and maintenance of emission control systems.
• Check, test, and repair all components and accessories of electrical systems, 6, 12, and 24 volts.
• Repair and maintain cooling and heating systems.
• Repair and maintain air conditioning systems.
• Repair and maintenance of brake systems and related components, including mechanical brakes, electric brakes, hydraulic brakes, and air brake systems.
• Repair and maintenance of exhaust systems.
• Overhaul, maintenance, and testing of hydraulic systems, including pumps, rams, control valves, lines, and hoses.
• Lubrication, greasing, and oil changes of cars, trucks, and heavy equipment according to specifications.
• Setup, maintenance, and operation of vehicle washing equipment and steam cleaner.
• Make visual inspections of equipment and report any needed repairs to the Supervisor.
• Make service calls for emergency repairs, heavy-duty towing, and equipment retrieval.
• Submit required work orders for work performed and time spent on the job.
• Charges parts, supplies, oils, and grease to work orders.
• Perform related duties as assigned by the supervisor.
• Perform welding on steel and aluminum using Gas, Arc, and Mig welding techniques.

Skills and Knowledge

• Skilled in analyzing, diagnosing, and correcting mechanical, hydraulic, and electrical failures and defects.
• Skilled in using specialized tools and machines standard to the trade.
• Ability to plan and lay out repair work. Read, understand, and carry out repair instructions from repair manuals. Follow oral and written instructions.
• Ability to maintain effective working relationships with fellow employees and the general public.
• Promote a safe work environment by following all company rules and regulations.
• Comply with the company attendance policy.
• Keeps the work area clean and free of clutter.
• Ability to engage in strenuous physical activity, including, but not limited to, stooping, standing, bending, climbing, etc. Ability to lift 50 lbs.

Requirements

• High school diploma or equivalent preferred.
• Minimum of 2–4 years of experience in heavy-duty diesel equipment maintenance and repair.
• Valid Class C driver's license: Class A or B license preferred.
• Ability to lift up to 50 lbs. and perform physical tasks including climbing, bending, and standing for extended periods.
• Must be able to work in varying environmental conditions, including exposure to dust, noise, and outdoor weather.

Physical Demands

The physical demands described here represent those that must be met by an employee to perform the essential functions of this job successfully. Reasonable accommodation may be provided to enable individuals with disabilities to perform the essential job functions:

• Frequent lifting, carrying, pushing, and pulling of tools and equipment.
• Extended periods of standing, kneeling, and working in awkward positions.
• Exposure to oils, greases, fumes, and mechanical hazards.
• Work may be performed indoors in a shop environment or outdoors, depending on operational needs.

Benefits

• Medical Insurance, Dental HMO/PPO, Vision, Basic and Voluntary Life, and Voluntary Accident.
• Employee Assistance Program (EAP)
• 401 (k) Retirement Plan- Company match
• Paid Sick time.
• Paid Holidays
• Paid Vacations
• Direct Deposit
• Paid weekly.
• Referral Bonus

This job description does not imply that the listed duties are the only responsibilities of an employee in this position. Employees may be asked to perform additional tasks as needed to ensure adequate coverage of the workload. Furthermore, employees must follow any job-related instructions and complete any other duties assigned by their supervisor. This job description does not constitute an employment agreement between the employer and the employee and may be changed by the employer as organizational needs and job requirements of the job change.