Heavy Equipment Mechanic

Ontario Transit Group; Toronto; On-site; CAD 60,000 - 80,000; Full time

Job summary

Ontario Transit Group is seeking an MSV Mechanic to ensure the reliability, safety, and efficiency of Multi-Service Vehicles (MSVs) for ongoing tunnelling projects in Toronto, Ontario. This role involves inspecting, diagnosing, and repairing MSV mechanical systems, ensuring compliance with safety regulations.

The successful candidate will have a strong background in industrial mechanics and be able to perform critical maintenance tasks in a challenging underground environment. This is a unionized role with salary according to the collective bargaining agreement.

Qualifications

• 5+ years of experience in industrial machinery repair with industry training courses.
• Strong knowledge of MSV components and systems.
• Familiarity with underground and tunnelling operations.

Responsibilities

• Inspect, troubleshoot, and repair MSV mechanical systems.
• Maintain hydraulic, pneumatic, and electrical systems.
• Perform scheduled preventive maintenance and document repairs.

Skills

Diagnostics

Mechanical troubleshooting

Heavy-equipment repair

Technical manual reading

Communication skills

Education

Completion of a 3–4‑year apprenticeship program in industrial mechanic/millwrighting

Industrial Mechanic (Millwright) trade certification

Tools

Mechanical testing tools

Hydraulic systems

Electrical systems

Job description

Ferrovial Construction Canada Inc. and VINCI Construction Grands Projects are undertaking the design, build, and finance the Ontario Line Southern Civil, Stations, and Tunnel (South Civil) package.

As Ontario Transit Group, we are now mobilizing our design and construction crews, with major works. The South Civil contract is anticipated to be completed in 2030.

The project will strengthen Ontario’s economy by supporting an estimated 1,500 jobs at the peak of construction.

What is the project?

• A six-kilometer tunnel and associated tunnelling works from Exhibition to Don Yard portal (west of the Don River).
• Stations:
  • One above-ground station to be integrated with the existing GO Transit Exhibition Station.
  • Two underground stations to be integrated with the existing TTC Osgoode and Queen subway stations.
  • Four new underground stations (King/Bathurst, Queen/Spadina, Moss Park, Corktown).

The benefits to Ontario!

Faster, more frequent, and reliable access to rapid transit with more than227,500 people will live within a 10-minute walk of an Ontario Line station.

• Improve the quality of life for commuters by reducing daily travel time.
• Reduce crowding on the existing Line 1 (Yonge-University) subway.
• Up to 57,000 more jobs accessible by transit (in 45 minutes or less) for Toronto residents.
• Economic and community growth along the future transit line and thousands of job opportunities annually during construction.
• Reduction in traffic congestion, greenhouse gases, and fuel consumption by providing an alternative transportation option.

Job Description

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.

Key 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.

Qualifications

• 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.

This is a unionized role; salary will be according to the collective bargaining agreement.

OTG is an equal‑opportunity employer, encouraging applications from all interested candidates, including Indigenous people, racialized people, neurodivergent people, people with disabilities, and individuals from gender and sexually diverse communities with intersectional identities. OTG is committed to fostering an inclusive, equitable, and accessible environment. If you require accommodation during the selection process, please contact [e-mail].