Lead water and wastewater estimating at Graham, using advanced software, Excel, and Primavera to develop accurate project costs and scopes.
As Senior Estimator, you will report to the Estimating Manager within Graham’s Water Division. The position requires combined field and estimating experience on Water/Wastewater projects, plus explicit communication with internal teams and industry partners. Your work supports wastewater treatment plants, water treatment facilities, processing and control systems, and stormwater infrastructure.
Key Responsibilities: Guide junior estimators and oversee the estimating process
Prepare detailed labor, equipment, and overhead cost estimates
Identify constructability issues, savings strategies, and competitive advantages




Oversee bid closings and verify subcontractor scopes and pricing
Create preliminary schedules and subcontractor scopes for planning
Requirements: Diploma or degree in construction management, engineering, or related field
10–12 years of field and estimating experience
Water/Wastewater project experience
Advanced estimating software, Excel, and Primavera proficiency
Gold Seal Certification or LEED/LEAN experience is an asset
Bring senior estimating leadership, project risk assessment, and scheduling expertise to Graham’s Water/Wastewater Division.

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📌 Senior Water Wastewater Estimator (Ontario)
🏢 Graham Contracting
📍 Ontario