What is the Prospect?
As part of an alliance agreement, Aecon has been awarded a contract in an Aecon-led partnership with Kiewit Nuclear Canada by Ontario Power Generation (OPG) for the execution phase on the Darlington New Nuclear Project (DNNP) in Clarington, Ontario. In 2025, Aecon began construction of the Unit 1 Small Modular Reactor at the Darlington site.

Job Summary
The STP Operator is responsible for operating and monitoring the Separation & Treatment Plant to efficiently separate solids, oil, and contaminants from wastewater generated during construction and tunnelling activities. The role ensures safe operation, environmental compliance, and continuous plant availability to support site operations.

Key Responsibilities – Plant Operation

Operate and monitor separation and treatment units including settling tanks, separators, hydrocyclones, clarifiers, oil‑water separators, and chemical dosing systems.

Control pumps, valves, mixers, and conveyors to maintain steady plant throughput.

Adjust flow rates, pressures, and dosing to optimize separation efficiency.

Monitoring & Quality Control

Monitor inlet and outlet water quality (pH, turbidity, suspended solids, oil content).

Take routine samples and maintain operational logs.

Ensure treated water meets discharge or reuse requirements.





Solids & Waste Handling

Manage sludge, separated solids, and oil waste.

Operate dewatering units and monitor cake quality.

Coordinate waste disposal as per environmental regulations.

Health, Safety & Environment (HSE)

Follow all site safety and environmental procedures.

Handle chemicals safely using proper PPE.

Prevent spills, overflows, and environmental incidents.

Reporting & Coordination

Report daily operations, downtime, and issues to the Supervisor.

Coordinate with TBM, slurry, dewatering, and site teams.

Support inspections by the client or authorities.

Pay Range
Effective May 1, 2025: $51.44/hr

Effective May 1, 2026: $52.80/hr

Effective May 1, 2026: $54.39/hr

Equal Opportunity Employer
We welcome all to apply including women, visible minorities, Indigenous peoples, persons with disabilities, and persons of any sexual orientation or gender identity. We are committed to adhering to the objectives and requirements outlined in the Accessible Canada Act (ACA), and to meeting the accessibility needs of persons with disabilities in a timely manner. Appropriate accommodations will be provided upon request throughout the interview and hiring process.

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📌 STP Operator (Unionized) (Ontario)
🏢 Aecon Group
📍 Ontario