TBM Mechanic

Ontario Transit Group - Ontario Line - Southern Civil, Stations & Tunnel; Toronto; On-site; CAD 70,000 - 100,000; Full time

Benefits offered by this job

Unionized role under Collective Bargai

Health benefits

RRSP matching

Job summary

Ontario Transit Group (OTG) is hiring a Mechanic to maintain, troubleshoot, and repair mechanical systems used in TBM and tunneling operations on the Ontario Line project in Toronto. The role supports continuous tunneling progress by ensuring equipment safety and high availability.

The successful candidate will have 3-5 years of experience in heavy industrial, tunneling, or construction settings, with a trade certification or apprenticeship in a mechanical discipline being an asset.

Qualifications

• 3-5 years of experience as a Mechanic, Welder or Pipe Fitter in heavy industrial, mining, tunneling, or construction environments.
• Trade certification or apprenticeship in a mechanical discipline is an asset.
• Strong understanding of hydraulic systems, rotating equipment, pumps, and heavy mechanical machinery.
• Ability to read and interpret mechanical drawings, schematics, and service manuals.

Responsibilities

• Perform preventative and corrective maintenance on TBM mechanical systems and related equipment.
• Diagnose mechanical faults and carry out repairs to restore equipment to full functionality.
• Respond to breakdowns quickly to minimize downtime and maintain production targets.
• Report maintenance activities in the appropriate log or system.
• Collaborate with Mechanical Foremen, TBM Operators, Electricians, and Fitters to support tunneling operations.

Skills

Mechanic experience

Welder background

Pipe Fitter

Education

Trade certification or apprenticeship in mechanical discipline

Tools

TBM systems

Job description

Company Description

Ferrovial Construction Canada Inc. and VINCI Construction Grands Projets are undertaking the design, build, and finance of 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 than 227,500 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 Mechanic is responsible for maintaining, troubleshooting, and repairing mechanical systems and equipment used in TBM and tunneling operations. This role ensures that all machinery—both on the TBM and within the tunnel—operates safely, efficiently, and with minimal downtime. The Mechanic works closely with supervisors, engineers, and equipment teams to perform inspections, respond to breakdowns, and support continuous tunneling progress.

Key Responsibilities

Maintenance & Repairs

• Perform preventative and corrective maintenance on TBM mechanical systems, including pumps, grinders, gearboxes, hydraulic systems, conveyors, and rotating equipment.
• Diagnose mechanical faults and carry out repairs to restore equipment to full functionality.
• Respond to breakdowns quickly to minimize downtime and maintain production targets.
• Carry on the tasks dictated on the maintenance routine, report it in the maintenance book or the electronic system provide for those tasks.
• Report to the Mechanical Foreman or the Plant Engineer in charge about whatever issue raised on the plant and equipment.

Troubleshooting

• Identify root causes of mechanical issues using diagnostic tools, technical manuals, and hands-on inspection.
• Work with fitters, engineers and supervisors to implement long-term corrective actions.
• Adjust, calibrate, and fine-tune mechanical systems to ensure optimal performance.

Inspections & Monitoring

• Conduct routine inspections of TBM and tunnel equipment to identify wear, leaks, misalignment, or potential failures.
• Monitor equipment performance and report abnormalities promptly.
• Maintain accurate records of inspections, repairs, and maintenance activities.

Safety & Compliance

• Follow all safety procedures, lockout/tagout protocols, and tunneling best practices.
• Participate in daily safety briefings and ensure safe operation of tools and machinery.
• Maintain a clean, organized, and hazard-free work area.

Collaboration & Support

• Work closely with Mechanical Foremen, TBM Operators, Electricians, and Fitters to support continuous tunneling operations.
• Assist with TBM maintenance during scheduled shutdowns, cutterhead inspections, and major mechanical interventions.
• Support shift-based operations, including nights and weekends as required.

Qualifications

• Minimum 3-5 years of experience as a Mechanic, Welder or Pipe Fitter in heavy industrial, mining, tunneling, or construction environments.
• Trade certification or apprenticeship in a mechanical discipline (e.g., Heavy Equipment Technician, Industrial Mechanic, Millwright, Welder) is an asset.
• Strong understanding of hydraulic systems, rotating equipment, pumps, and heavy mechanical machinery.
• Ability to read and interpret mechanical drawings, schematics, and service manuals.
• Experience with TBM systems (EPB or slurry) will be mandatory
• Strong troubleshooting skills and the ability to work under pressure in a fast-paced environment.
• Commitment to safety and adherence to all site regulations.
• Must be willing to join the local union as required.

Additional Information

What We Offer

• This is a unionized role; therefore, the salary will be the according to the Schedule and Group per the Collective Bargaining Agreement.

Why OTG?

Welcome to Ontario Transit Group (OTG), located in the heart of Downtown Toronto, where diversity and passion collide. As we work on the groundbreaking Ontario Line project, we prioritize fostering a positive culture. Join us and be part of a team that celebrates our employees, organizes family events, and promotes health and wellness initiatives. Our commitment to personal and professional growth means annual performance reviews, salary increases, comprehensive health benefits, generous RRSP matching