Heavy Equipment Mechanic

Responsibilities

• Inspect, troubleshoot, and repair MSV mechanical systems, including engines, power units, steering systems, transmission assemblies, and drivetrain components.
• Maintain and service hydraulic, pneumatic, compressed‑air, and electrical systems found in MSV equipment.
• Perform scheduled preventive maintenance, lubrication, adjustments, and component replacements to ensure equipment reliability in continuous tunnelling operations.
• Diagnose faults using mechanical, hydraulic, and electrical testing tools; interpret error indications and technical manuals.
• Support MSV operators with troubleshooting, equipment configuration, and resolving operational performance issues.
• Document repairs, service reports, and parts usage following maintenance protocols.
• Conduct pre‑use and post‑use inspections on MSVs, checking braking systems, safety interlocks, steering modules, wheel/bogey assemblies, and load‑bearing components.
• Ensure MSVs remain compliant with tunnelling safety regulations, ventilation requirements, and confined‑space operational rules.
• Assist with MSV trailer coupling/uncoupling, shunting, alignment, and setup activities during transport shifts.
• Coordinate with TBM logistics teams to ensure vehicle availability and reliability for continuous transport cycles.
• Follow Ontario OHSA tunnel‑specific safety procedures, air/gas monitoring guidelines, emergency response expectations, and underground hazard controls.
• Maintain tidy and safe underground work areas, including equipment bays, maintenance stations, and tunnel access routes.
• Completion of a 3-4‑year apprenticeship program in industrial mechanic/millwrighting or 5+ years of experience in industrial machinery repair with industry training courses.
• Industrial Mechanic (Millwright) trade certification (voluntary but preferred in Ontario).
• Additional mechanical or electrical equipment certifications considered an asset.
• Strong knowledge of MSV components and systems, including power units, hydraulic systems, electrical systems, transmission/drives, chassis, and bogeys/wheel modules.
• Ability to read technical manuals, schematics, and equipment specifications.
• Skilled in diagnostics, mechanical troubleshooting, and heavy‑equipment repair.
• Familiarity with underground and tunnelling operations, confined‑space work, and ventilation‑dependent environments.
• Understanding of underground rescue procedures, emergency protocols, and air‑monitoring principles (asset but often required).
• Ability to work underground in confined spaces, elevated noise, dust, and variable temperatures.
• Physically capable of lifting, climbing, crawling, and performing repairs in restricted spaces.
• Strong communication and teamwork skills to coordinate with operators and tunnel crews.

Benefits

Additional Information

The MSV Mechanic is responsible for maintaining, diagnosing, and repairing Multi‑Service Vehicles (MSVs) used to support Tunnel Boring Machine (TBM) operations on large‑scale tunnelling projects. This role ensures the reliability, safety, and efficiency of MSVs that transport segments, materials, equipment, and personnel throughout the underground tunnel system. The mechanic works closely with operators, tunnel supervisors, and maintenance teams in a demanding underground environment.

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