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Black & McDonald Limited

Class B Refrigeration Operator

Whitby, ON, Canada

Job type: Full-time
Posting language: English
Posted: Sep 21, 2026

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Original job description

Class B Refrigeration Operator
Location: Whitby, ON

Shift: Continental rotation (7 days on / 7 days off). Rotating 12-hour day and night shifts.

ABOUT THIS CAREER OPPORTUNITY

If you are a technical and hands-on professional searching for the opportunity to build a solid foundation for your career, this position is for you. The Class B Refrigeration Operator opportunity work with-in Whitby location and reports to the Chief Operator. The position requires continental shifts, thus candidates must have open and flexible availability.

You will be responsible for the following duties and responsibilities:

Experience within a TSSA-regulated ammonia plant
Operate air compressors, chillers, water towers, water softeners, air dryers, pumps, and fans
Chiller maintenance including cooling towers and associated equipment
Extensive experience on HVAC/R systems
Responsible for the safe operation of the refrigeration plant
Perform all tasks related to the safe and efficient operation of the plant including repairs and maintenance
Perform routine inspection and testing of equipment and building infrastructure to ensure proper operation
Perform minor repair and general maintenance duties associated with building systems
Document air compressor readings, all plant steam produced and consumption and gas consumption; supply gas forecasts to gas supplier
Track and log all gas, water, and hydro readings
Monitor and maintain water treatment for chillers and cooling towers
Familiar with CMM and preventative maintenance programs
Provide access and assistance to sub-trades as required

EDUCATION REQUIREMENTS

Must possess a 3^rd Class Power Engineer certificate or higher or “A” or “B” Refrigeration Operator class certificate

WORK EXPERIENCE REQUIREMENTS

Must have experience working as an operator in an ammonia plant

SKILLS, ABILITIES, AND OTHER REQUIREMENTS

Must be able to work 7AM to 7PM on a continental rotational shift
Must be able to commute to Whitby
Strong troubleshooting and interpersonal skills
Bending and lifting required; lifting under 30 kg
Ability to climb stairs and work on a ladder or scaffold as required
Good computer skills
Good oral and written communication skills
Provide vacation coverage for other operators
Must be able to successfully obtain and maintain necessary security clearances

The expected salary range for this role is determined in accordance with the union collective agreement

Black & McDonald welcomes and encourages applications from persons with disabilities.

Accommodations are available upon request for candidates taking part in all aspects of the recruitment and selection process.

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More about this job

Responsibilities

The operator is responsible for the safe and efficient operation of the refrigeration plant, including air compressors, chillers, and associated building infrastructure. Duties include performing routine inspections, maintenance, repairs, and documenting plant readings and consumption data.

Requirements

Candidates must possess a 3rd Class Power Engineer certificate or higher, or an 'A' or 'B' Refrigeration Operator class certificate. Extensive experience working as an operator in an ammonia plant is required, along with the ability to work continental rotational shifts.

Skills

Ammonia plant operation
HVAC/R systems
Air compressors
Chillers
Cooling towers
Preventative maintenance
Troubleshooting
Water treatment
Computer skills
Communication skills
Safety compliance
Equipment inspection
Technical documentation
Mechanical repair

Visa sponsorship

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Keywords

Ammonia plant
Refrigeration Operator
Power Engineer
HVAC/R
TSSA
Air compressors
Chillers
Cooling towers
Preventative maintenance
CMM
Building infrastructure
Mechanical maintenance
Water treatment
Safety protocols
Continental shift
Industrial operations

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