Truck Mechanic

Job Description

Castle Rock Enterprises has been a market leader in the areas of underground utilities (sewer, water, electrical), site preparation, quarry services, land remediation and trucking for over 25 years. Founded in 1995, the company was purchased by Dakwakada Capital Investments (DCI) in 2010, which has maintained its family‑business culture. DCI is a privately owned investment firm in Whitehorse, Yukon that holds and manages most business assets of the Champagne and Aishihik First Nations (CAFN).

On top of its reputation as a top-quality construction company, it includes being a 100% First Nations owned business in its competitive advantage. Castle Rock maintains strong partnerships with CAFN and the broader Whitehorse and Yukon communities through many community giving and sponsorship programs.

One of the first companies in the Yukon to achieve COR Certification, the health and safety of employees, contractors and the public is an integral part of our daily activities and our most vital core value at Castle Rock.

Position Summary

The Truck Mechanic is responsible for performing maintenance, repairs, and inspections to ensure the safe and efficient operation of trucks, trailers, and support vehicles used in civil construction. This role involves diagnosing and resolving mechanical, hydraulic, and electrical issues, carrying out preventative maintenance, and supporting field operations by minimizing equipment downtime. The Truck Mechanic keeps the fleet reliable, safe, and ready for daily construction activities.

Key Responsibilities

Maintenance & Repairs

• Perform routine maintenance and repair of trucks, trailers, and support vehicles used in civil construction.


• Diagnose mechanical, hydraulic, and electrical issues, completing repairs in a timely and effective manner.


• Carry out preventive maintenance as scheduled, documenting work performed.


• Assist with field repairs or service calls to minimize equipment downtime.

Safety & Compliance

• Follow company and industry safety protocols at all times.


• Ensure repairs and maintenance meet regulatory standards and manufacturer specifications.


• Use tools and equipment properly, maintaining a safe and organized work area.


• Report hazards, near misses, and unsafe conditions immediately.

Tools, Parts & Inventory Support

• Use shop tools and diagnostic equipment appropriately and safely.


• Notify the Shop Manager when parts, supplies, or tools are needed.


• Help maintain shop equipment in good working order.

Communication & Coordination

• Work closely with the Shop Manager or Operations team to prioritize repairs.


• Provide clear updates on repair status, estimated timelines, and equipment readiness.


• Collaborate with drivers and operators to troubleshoot reported equipment issues.

Quality & Reliability

• Complete all work to a high standard of quality, ensuring trucks and equipment are safe and reliable for field use.


• Test and verify repairs before returning equipment to service.


• Identify and communicate recurring or potential issues to the Shop Manager.

Continuous Improvement

• Participate in ongoing training and stay current on repair techniques and equipment updates.


• Support apprentices or junior mechanics by sharing knowledge and safe practices when appropriate.

Requirements

• Red Seal Truck and Transport Technician certification (preferred), or Red Seal Heavy Duty Equipment Technician certification.


• 3+ years of experience as a Red Seal Technician, ideally within a civil construction company.


• Exposure to diesel engines (including emissions), hydraulics, and electrical systems.


• Ability to review and interpret technical specifications and repair manuals.


• Proficient in written and verbal English.


• Strong attention to detail, problem‑solving skills, and commitment to safe work practices.


• Ability to multi‑task, prioritize, and work effectively under pressure in a fast‑paced environment.

Hours

• 8 hours a day


• 40 hours a week


• OT as required

If you are a dedicated and motivated infrastructure estimator looking for an exciting and challenging growth opportunity in the incredible environment that Whitehorse and the Yukon offers, we look forward to hearing from you.

As a 100% First Nation‑owned business, we strongly encourage submissions from qualified CAFN Citizens and First Nation, Metis and Inuit Citizens from across Yukon and other territories and provinces.

While we thank and appreciate all applicants, only those selected for an interview will be contacted.

No phone calls or agencies, please.