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Third Class Operating Engineer Jobs in Ontario (NOW HIRING)

Apotex

Technician, Building System

North York, ON

CA$72K - CA$96K/yr

Trade certification in appropriate field (licensed millwright, refrigeration mechanic, industrial electrician etc.) required. * 3rd Class Operating Engineer's Certificate or 4th Class Certificate ...

People Finders Personnel

Building Operator

Vaughan, ON · On-site

CA$33/hr

BES I Certificate; or 4th class Operating Engineer; or provincial trades certification of qualification or equivalent field work experience. * Minimum 3-5 years of experience in the operation and ...

Enwave

Assistant Shift Engineer

Toronto, ON · On-site

Hold a 2nd Class Operating Engineer Certificate or be in a position to obtain a 2nd class OE certificate within 4 months of accepting this position. * Have strong technical skills and be able to work ...

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All JobsThird Class Operating Engineer JobsThird Class Operating Engineer Jobs in Ontario

Third Class Operating Engineer information

What is the difference between Third Class Operating Engineer vs Second Class Operating Engineer?

AspectThird Class Operating EngineerSecond Class Operating Engineer
CredentialsRequires a Third Class license, often with specific experienceRequires a Second Class license, more extensive experience and testing
Work EnvironmentOperates boilers, pumps, and HVAC systems in buildings or facilitiesHandles larger or more complex systems, often in industrial or larger commercial settings
Employer & IndustryCommonly employed in commercial buildings, hospitals, and schoolsFound in industrial plants, large commercial facilities, and power plants

The main difference between a Third Class Operating Engineer and a Second Class Operating Engineer lies in their licensing requirements, scope of work, and the complexity of systems they operate. Second Class licenses permit handling larger and more complex equipment, often in industrial settings, while Third Class licenses are suitable for smaller systems in commercial buildings.

What are popular job titles related to Third Class Operating Engineer jobs in Ontario? For Third Class Operating Engineer jobs in Ontario, the most frequently searched job titles are:
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Infographic showing various Third Class Operating Engineer job openings in Ontario as of July 2026, with employment types broken down into 1% As Needed, 64% Full Time, 34% Part Time, and 1% Contract. Highlights an 97% Physical, 1% Hybrid, and 2% Remote job distribution.

Building Operator I (4th Class Stationary Engineer)

Black & McDonald Limited

Ottawa, ON • On-site

Full-time

Posted yesterday

Job description

BUILD YOUR CAREER AT BLACK & MCDONALD

Black & McDonald is an integrated, multitrade service provider that safely delivers high quality construction, facilities management, and technical solutions. We are a family-owned and family-run company that employs thousands of highly skilled and talented professionals across North America. With 100 + years of diverse market experience, we are a forwardthinking organization with a strong track record of delivering operational excellence and customer-focused solutions that stand the test of time.

ABOUT THIS CAREER OPPORTUNITY

Black & McDonald's Facility Management & Operations team is growing! We are building an anticipatory pool of qualified professionals to support future opportunities. If you are a committed and collaborative professional looking to contribute to a hardworking, innovative team, this opportunity is for you.

The Building Operator position is a unionized position and typically reports directly to the Contract Manager. Their primary focus is safe and efficient operation of the facility, ensuring availability of supplies for maintenance of system equipment, and diagnosing trouble calls and developing action to be taken.

Responsibilities include but are not limited to:

  • The design and implementation of custom control applications
  • Troubleshoot BAS programming
  • Provide BAS support network support as required
  • Perform shift tours and log readings
  • Start-up/shut down major building equipment
  • All water treatment duties
  • Diesel, fire alarm, life safety tests
  • Air balancing
  • AHU maintenance and alignment
  • Heat pump servicing and trouble shooting
  • Alignment of pumps and couplings
  • Minor repairs to pneumatic equipment
  • All aspects of the heating ventilation and air conditioning systems

COMPETENCY REQUIREMENTS

  • Change Orientation
  • High Attention to Detail
  • Communicates Effectively
  • Continuous Learning
  • Customer Focus
  • Holds Self and Others Accountable
  • Problem Solving and Innovation
  • Teamwork and Collaboration
  • Values and Respects Others
  • Maximizes Business Performance and Team Effectiveness

EDUCATION REQUIREMENTS

  • 4th or 3rd Class Operating Engineer certificate is mandatory, with extensive experience in BAS and HVAC systems.

WORK EXPERIENCE REQUIREMENTS

  • Building Operator with 2 years' facilities maintenance and operations experience.
  • Strong technical capabilities in building systems and equipment.
  • Heating & cooling systems, safety & compliance, and diagnostic tools knowledge.
  • Basic HVAC and plumbing skills.

SKILLS, ABILITIES, AND OTHER REQUIREMENTS

  • Excellent customer service skills in ensuring client requests are responded to professionally and promptly.
  • Bilingual English-French is an asset.
  • Must be able to work in confined spaces and/or working at heights.
  • Bending and lifting (under 30kg) required.
  • Valid driver's license is required.
  • Must obtain and maintain a valid Reliability Clearance (Canadian Citizen or Permanent Resident of 5 years).

This position's wage rate follows the 787 Union Agreement schedule.

Black & McDonald welcomes and encourages applications from persons with accessibility accommodation requirements. Accessibility accommodations are available upon request for candidates taking part in all aspects of the recruitment and selection process.

If you are an existing Black & McDonald employee, please notify your supervisor of your interest and intent to apply before applying.