Senior Water Resources Engineer

Communities everywhere share the need for clean water. And as they work to meet that need, they’re facing new, more complex challenges every day. Our water professionals collaborate to contribute innovative ideas, guided by scientific rigor and a vision for sustainable growth. Every day, we’re helping communities improve, reuse, and protect our world’s most precious resource. Join our team to deliver transformational projects that will benefit future generations. Grow with us, H2O+U. Your Opportunity We are seeking a senior Professional Engineer who has built the majority of their career around hydraulic and hydrologic modelling and is motivated by developing both high-quality models and capable modellers. This is a hands-on technical leadership role for someone who wants to remain actively involved in complex modelling while establishing sound approaches, reviewing technical work, sharing practical knowledge, and mentoring junior and intermediate staff. The successful candidate will bring deep experience in wastewater and stormwater collection systems, potable water distribution systems, or a combination of these areas. Our team collaborates on projects across Canada and North America for municipal, regional, and other public-and private-sector clients. As part of the Urban Water Resources Water Delivery Team, you will serve as a senior technical resource for sanitary, stormwater, combined sewer, drainage, and water distribution modelling. You will work alongside project managers and discipline leads, but your primary focus will be technical excellence: solving difficult modelling problems, strengthening modelling practices, reviewing work, teaching others, and helping teams apply models with sound engineering judgement. You will also provide senior technical input to proposals, scopes, work plans, level-of-effort estimates, and client discussions. Your

Key Responsibilities
- Serve as a senior technical lead for hydraulic and hydrologic modelling assignments involving wastewater, stormwater, combined sewer, drainage, and potable water systems.
- Remain actively involved in developing, calibrating, validating, troubleshooting, maintaining, and applying complex hydraulic models.
- Establish fit-for-purpose modelling approaches, assumptions, workflows, documentation standards, and quality expectations.
- Provide senior technical review and quality assurance of model inputs, calibration, validation, scenarios, outputs, limitations, and conclusions.
- Guide the use of monitoring, GIS, SCADA, rainfall, operational, and other system data to build, calibrate, and validate models.
- Lead the technical assessment of system capacity, performance, level of service, wet-weather response, flood risk, servicing constraints, and operational issues.
- Develop and evaluate future growth, climate, operational, infrastructure, and remedial scenarios to support master planning, servicing studies, capital planning, and system optimization.
- Interpret model results, identify uncertainty and limitations, and translate complex findings into practical recommendations for clients and project teams.
- Mentor junior and intermediate modellers through hands-on coaching, technical review, structured feedback, and shared problem solving.
- Develop and deliver modelling guidance, examples, training materials, workshops, and lessons learned that strengthen consistent practices across the team.
- Help staff develop sound engineering judgement, including understanding model purpose, data quality, calibration, sensitivity, uncertainty, and appropriate interpretation rather than relying only on software outputs.
- Review and contribute senior technical input to proposals, scopes, work plans, methodologies, assumptions, level-of-effort estimates, schedules, and fee estimates for modelling assignments.
- Participate in client discussions, technical presentations, and project workshops as a trusted modelling specialist.
- Collaborate with project managers, discipline leads, GIS and data specialists, and delivery teams to support high-quality work while maintaining a primary focus on technical leadership rather than overall project management. Your Capabilities and Credentials
- Advanced understanding of hydraulic and hydrologic principles as they apply to urban drainage, collection, and/or water distribution systems.
- Extensive hands-on experience developing, calibrating, validating, troubleshooting, reviewing, and applying hydraulic models to complex infrastructure questions.
- Advanced experience with at least one major modelling platform, such as InfoWorks ICM, PCSWMM, InfoSWMM, WaterGEMS, or WaterCAD. Experience with MIKE+, InfoWater, or comparable platforms is also valued.
- Demonstrated ability to independently define modelling approaches, assess fitness for purpose, identify technical risks, and resolve complex model development and application issues.
- Strong experience managing, analyzing, and interpreting lar