Senior Water Resources Engineer

Onterris•Calgary, AB

About The Position

At Onterris, we build careers grounded in purpose, responsibility and real-world impact. “For Planet and Progress” is our north star that guides everything we do. We believe environmental responsibility and human progress are interconnected, interwoven and international. Our scientists, engineers, field teams, consultants and professionals collaborate across disciplines and geographies, guiding industries and governments, ensuring that communities and environments thrive. When you join us, you’re not just forging a career, you’re joining a movement. A movement for better thinking, smarter solutions and lasting impact. Together, we will advance our way of life and protect the integrity of our environment every step of the way. At Onterris, we bridge the gap between advanced numerical analysis and practical, constructible civil design. Our Surface Water Engineering team in Calgary handles Western Canada’s most complex water challenges, from master drainage planning and flood resilience to protecting sensitive aquatic ecosystems. We don’t just write reports; we build resilient infrastructure. As a Senior Engineer, you will help shape our surface water strategy, mentor the next generation of engineers, and directly influence how communities manage water for decades to come.

Requirements

Bachelor’s degree in Civil, Water Resources, or Environmental Engineering.
Professional Engineer (P.Eng.) or Professional Licensee (P.L.Eng.) registration with APEGA, or eligibility for immediate transfer.
10 or more years of progressive experience in water resources and municipal engineering, with a strong emphasis on urban stormwater management and surface water modeling.
Advanced experience with urban drainage tools such as PCSWMM, EPA SWMM, MIKE+, InfoWorks ICM, or GeoSTORM.
Experience with Civil3D, AutoCAD, and spatial analysis platforms (ArcGIS, QGIS, Global Mapper).
Proven track record of delivering detailed design packages, preparing tender documentation, and providing construction oversight.
Outstanding written and verbal communication skills, with a demonstrated ability to present complex technical findings clearly to clients, multidisciplinary teams, and regulatory bodies.
Valid Class 5 driver's licence with a clean record, and willingness to travel periodically within Alberta, British Columbia, and Saskatchewan for field visits and client meetings.

Nice To Haves

A graduate degree (M.Sc. or Ph.D.) is considered an asset.
Familiarity with additional hydrotechnical software (HEC-RAS, HEC-HMS, SWAT, HSP-F, or EFDC) is an asset.
Knowledge of scripting languages (Python, R, VBA) for model automation and data processing is a strong asset.

Responsibilities

Lead conceptual to detailed engineering design for major surface water, municipal stormwater, and flood mitigation projects across AB, BC, and SK.
Hands-on oversight and preparation of conceptual, preliminary, and detailed designs for: Stormwater drainage networks & storage facilities, Constructed wetlands & low-impact development (LID) features, Overland drainage systems (culverts, ditches, and engineered channels), Erosion and sediment control (ESC) measures.
Direct specialized hydrologic and hydraulic modeling initiatives including Master Drainage Plans (MDPs), Staged Master Drainage Plans (SMDPs), dual-drainage network evaluations using PCSWMM, dam breach inundation analyses, and detailed wetland water balance studies. Apply cutting-edge LID features, green infrastructure, and climate-resilient designs to complex urban and natural systems.
Guide hydrotechnical, river engineering, and water quality assessments, balancing development requirements with natural system protection.
Lead multi-disciplinary scopes from concept to commissioning, managing schedules, budgets, scope changes, and financial performance while serving as the primary client contact.
Lead the preparation of tender documents, technical specifications, and construction cost estimates. Provide senior oversight during resident engineering and contract administration phases.
Build strong relationships with municipal, provincial, and federal regulatory bodies to navigate approval pathways efficiently.
Work collaboratively across disciplines, integrating input from hydrogeology, geotechnical engineering, surveying, landscape architecture, transportation, and natural sciences.
Partner with leadership on business development, proposal preparation, client engagement, and expanding our surface water practice footprint across Western Canada.
Serve as a technical mentor for junior and intermediate engineering staff, guiding their development in complex modeling, detailed design, report writing, and personal growth.