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3Rd Class Operating Engineer Jobs in Ontario (NOW HIRING)

ExxonMobil

Wage Utilities Operator

Nanticoke, ON · On-site

... operating engineering certification. About you Skills and Qualification * Chemical or Mechanical ... Minimum 3rd Class Stationary Engineer certificate or equivalent. Preferred 2nd Class Stationary ...

Allied

Building Operator

Toronto, ON · On-site

CA$60K - CA$68K/yr

Certifications : 4th or 5th class Operating Engineer, or a provincial trades certification is an asset, but not a requirement. $60,000 - $68,000 a year Allied determines individual compensation by ...

Art Gallery of Ontario

Building Operator 3

Toronto, ON · On-site

CA$68K - CA$85K/yr

Ontario 3rd Class Stationary Engineer's License * Ontario Refrigeration Class B License * Ontario Building Environmental Systems (BES) Operator Class I * Ontario Skilled Trade License (e.g ...

Ainsworth

Building Operator

Toronto, ON

Power or Stationary Operating Engineer Class 4 (not Required) * Refrigeration Operator Class B (not required) * Building Environmental Systems 1 or 2 (preferred) * Facility Operations Certificate ...

Ainsworth

Building Operator

Toronto, ON

Power or Stationary Operating Engineer Class 4 (not Required) * Refrigeration Operator Class B (not required) * Building Environmental Systems 1 or 2 (preferred) * Facility Operations Certificate ...

Ainsworth

Building Operator

Toronto, ON

Power or Stationary Operating Engineer Class 4 (not Required) * Refrigeration Operator Class B (not required) * Building Environmental Systems 1 or 2 (preferred) * Facility Operations Certificate ...

CEDA

Utility Operator, Class 2

Sarnia, ON · On-site

... Operating Engineers - Local 793 after 1040 hours worked * Eligible for Overtime as per the ... Valid Class G driver's license with no more than 5 demerits in the last two years * 1+ years ...

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All Jobs3Rd Class Operating Engineer Jobs3Rd Class Operating Engineer Jobs in Ontario

3Rd Class Operating Engineer information

What is a 3rd class operating engineer?

3rd Class Operating Engineers are licensed professionals responsible for operating, maintaining, and monitoring boilers, engines, and other mechanical systems within industrial, commercial, or institutional facilities. They ensure that equipment runs safely and efficiently, often performing routine inspections, troubleshooting issues, and carrying out minor repairs. Their license typically allows them to work with specific types and sizes of equipment, as regulated by local or regional authorities. Advancement to higher classes of operating engineers generally requires additional experience and successful completion of further examinations.

What are the typical daily responsibilities of a 3rd class operating engineer in a commercial building setting?

As a 3rd Class Operating Engineer in a commercial building, your daily tasks often include monitoring, operating, and maintaining boilers, HVAC systems, and other mechanical equipment. You'll perform routine inspections, log equipment readings, and respond to alerts or malfunctions as they arise. Collaboration with senior engineers and building maintenance staff is common, especially when troubleshooting or during scheduled repairs. Staying organized and attentive to detail is essential, as safety and compliance with regulations are top priorities in this role.

What are the key skills and qualifications needed to thrive as a 3rd class operating engineer, and why are they important?

To thrive as a 3rd Class Operating Engineer, you need a solid knowledge of mechanical systems, boiler operations, and safety protocols, typically supported by a valid 3rd Class Operating Engineer license or certificate. Familiarity with equipment like HVAC systems, pressure vessels, and computerized building management systems is often required. Strong problem-solving skills, attention to detail, and effective communication help you respond to emergencies and coordinate with maintenance teams. These skills are crucial for ensuring safe, efficient, and compliant operation of complex building systems.

What is the difference between 3Rd Class Operating Engineer vs 2Nd Class Operating Engineer?

Aspect3Rd Class Operating Engineer2Nd Class Operating Engineer
CredentialsRequires a 3rd Class license, often with some work experienceRequires a 2nd Class license, more extensive experience and testing
Work EnvironmentOperates and maintains heating, cooling, and other mechanical systems in buildingsHandles more complex systems, often overseeing multiple equipment types
Employer & IndustryCommonly employed in commercial buildings, hospitals, and industrial facilitiesWorks in similar settings but with greater responsibilities and system complexity

The main difference between a 3rd Class Operating Engineer and a 2nd Class Operating Engineer lies in their licensing requirements, experience, and scope of responsibilities. A 2nd Class license allows for handling more complex systems and typically requires more extensive training and experience. Both roles are vital in maintaining building systems, but the 2nd Class Operating Engineer has a broader scope of work and higher qualifications.

How much does a 3rd class operating engineer make?

A 3rd class operating engineer in Ontario typically earns between CAD 50,000 and CAD 70,000 annually, depending on experience, location, and the specific employer. Certification and the ability to operate various mechanical systems can influence salary levels.
3Rd Class Operating Engineer jobs near you
Infographic showing various 3Rd Class Operating Engineer job openings in Ontario as of September 2026, with employment types broken down into 86% Full Time, 9% Part Time, and 5% Nights. Highlights an 100% In-person job distribution.

Wage Utilities Operator

Nanticoke, ON • On-site

ExxonMobil
Oil and Gas Extraction • 10K+ employees
Learn more about ExxonMobilexternal

Full-time

Medical, Retirement, PTO

This job post has expired 4 days ago. Applications are no longer accepted.

ExxonMobil rating

6.0

Company rating: 6.0 out of 10

Based on 232 frontline employees who took The Breakroom Quiz

Job description

At Imperial, we work every day to responsibly develop Canada’s energy resources – applying technology and innovation to supply affordable, accessible and reliable energy while reducing emissions. Imperial recognizes the important role we can play by advancing climate solutions within our operations and by providing lower life-cycle emission products to our customers. This effort is powered by a unique and diverse workforce fueled by a pride in what we do and what we stand for. 

The success of our upstream, downstream and chemical, and corporate divisions is the result of the talent, curiosity and drive of our people. They bring solutions every day to optimize our strategy in energy, chemicals, lubricants and lower-emissions technologies. 

Imperial honours diverse backgrounds so we can be a place where people can bring their full selves to work, no matter their identity, race, gender, sexual orientation, age, or ability.

At Imperial, we want you to come for the position and stay for the career. As an integrated company, we are uniquely positioned to offer you a wide range of career prospects and growth opportunities through the course of your career with us. We invite you to bring your ideas and help create sustainable solutions that improve quality of life and meet society’s evolving needs. 

Job Role Description

The Onsites Process Operator is responsible for the safe and effective operation of process and / or plant equipment in industrial settings. This role involves starting up, shutting down, monitoring and controlling production processes, ensuring compliance with safety and environmental regulations. Operators play a key role in maintaining product quality and consistency, and they work closely with quality control and maintenance teams to address any issues that arise. They are also involved in the continuous improvement of process efficiency and the implementation of best practices to enhance overall plant performance.

Job Role Responsibilities

  • Ensuring the safety of yourself and coworkers while performing tasks
  • Monitoring the operation and equipment for deviations and troubleshooting when required
  • Inspecting, and adjusting, equipment and process variables to maintain a safe and environmentally sound operation
  • Ensuring equipment is operated efficiently while maintaining a high degree of reliability and product quality
  • Maintaining process equipment through preventative maintenance
     

As a Process Operator you will join one of our four shift teams and follow the rotating shift schedule.  You'll have the opportunity to interact with and learn from experienced technicians and other groups within the refinery including the maintenance and technical departments.  You will be required to complete the progression and training requirements of your division, including the mandatory requirement to obtain the necessary operating engineering certification.

About you

Skills and Qualification

  • Chemical or Mechanical Technologist diploma or an equivalent combination of formal education and petrochemical industry experience in the judgment of management.
  • High school diploma or equivalent is required.
     

Skills and Experience/Qualifications

  • Minimum 3rd Class Stationary Engineer certificate or equivalent.  Preferred 2nd Class Stationary Engineer certificate for placement into the site’s boiler house/utilities area
  • Able to respond in stressful situations, emergency response training considered an asset
  • Sound reasoning ability with a high level of self-initiative and a strong desire to learn
  • Excellent interpersonal and communication skills and the ability to work in a team environment
  • Knowledge and skills with computer applications
  • Valid driver's license is required for this position
  • Able to meet the essential physical demands of the position as per job demands analysis


Start date: Q4, 2026
 

Location: Nanticoke, ON

Your benefits

  • A company committed to career growth - we recruit those who are interested in a career with Imperial and prefer to develop and promote people from within.  Our career management process means that you will likely perform a number of unique, challenging roles during your career.
  • Successful networking and mentoring programs - enables you to spend time with managers from across the organization to learn about other departments and opportunities.  Also allows you to connect with peers at a similar experience level.
  • Commitment to safety, ethics & continuous improvement - these standards are the reason Imperial is an industry leader.  You will work for a company that upholds safety and ethics ideals and continues to seek out ways to improve. 
  • Competitive vacation
  • Exceptional benefits program - includes competitive savings, retirement, and healthcare plans that you can customize to meet your individual needs. A comprehensive relocation package is provided, if required. Educational and physical fitness financial assistance programs round out our benefits package.
  • Continuous learning environment - encourages you to augment your skills and capabilities. 
  • If you are talented, driven, and want to make meaningful contributions that really impact environmental, safety and bottom line objectives, then you owe it to yourself to apply with Imperial.

Other considerations

  • For applicants selected to be interviewed, pre-employment background screening will be required
  • We thank all those who apply; however, only those candidates selected for interviews will be contacted
  • In certain situations, Imperial may use your application to consider your suitability for other positions in the company and may also provide the information to its affiliates, including affiliates of ExxonMobil Corporation, in connection with possible opportunities at those affiliates.

Application Deadline: September 7, 2026

Imperial is an Equal Opportunity Employer. Imperial is committed to providing equitable treatment and equal opportunity to all individuals and encourages all eligible applicants to apply.

Imperial conducts business in a manner that respects the land, environment, rights and cultures of Indigenous communities. In the areas where we explore, develop and operate, Imperial engages Indigenous communities in open and forthright consultation and strives to establish meaningful relationships built on mutual trust and respect. Please see here for more information on Imperial’s Indigenous Relations Guiding Principles and Guidelines.

Imperial is committed to supporting persons with disabilities throughout the recruitment process. We will work with qualified applicants to provide reasonable accommodation upon request at Recruit.Services.CA@exxonmobil.com.

Eligibility to work in Canada

All applicants who receive an offer of employment must be eligible to work in Canada on a regular full-time basis without restrictions on their start date.  Proof of eligibility shall be in the form of a Canadian birth certificate, Canadian passport, Canadian citizenship certificate, Canadian certificate of permanent residence, Canadian open work permit or receipt from Immigration Canada of an application for a post-graduate work permit. 

Proof of eligibility must be current and valid (not expired, cancelled or voided). Proof of eligibility will be required if an offer of employment is made. Failure to provide proof of eligibility at least six (6) weeks prior to the start date may result in the offer of employment being rescinded.

Job ID: 108354

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