Heavy Equipment Mechanic

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.

Additional Information

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, industry education support, and career development opportunities.

At OTG, we embrace diversity, recognizing that it strengthens us as a team and as a company. We are an equal-opportunity employer, encouraging applications from all interested candidates. We value 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 hr@ontransitgroup.ca.

OTG uses artificial intelligence (AI) tools as part of the applicant screening process. However, applications will also be reviewed by a member of our Recruitment team to ensure a fair and thorough assessment.

If you're ready to be part of our dynamic team in one of the world's most diverse cities, don't wait any longer—apply now!

While we appreciate your interest, only selected candidates will be contacted for interviews. Please note that we do not accept agency submissions.