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Susan St. Louis

B.A.Sc., P.Eng., LEED AP
Operations Lead / Partner


Susan has 25 years of experience in infrastructure planning and design. She has served as project director, project manager, design lead and contract administrator on numerous infrastructure projects including roadway reconstructions, residential and commercial site developments, water, storm and sanitary infrastructure projects, recreational facilities design, class environmental assessments, contract administration assignments and multidisciplinary projects. Originally joining Dillon in 1994 in Dillon's Windsor, Ontario office, Susan relocated to the Vancouver, BC office in 2012 to build engineering capacity. In 2017, Susan relocated to the Kitchener, Ontario office to again focus on increasing our engineering capacity. Susan has worked on infrastructure projects across the country, having been a licenced professional engineer in Ontario, British Columbia and Alberta. Susan is currently the operations lead for our government client group.

Gardiner Expressway Waterfront Renewal - Toronto, ON

The Gardiner Expressway is a municipal expressway serving traffic in downtown Toronto running close to Lake Ontario’s shoreline.  Sections of the highway date back to the 1950s. Starting in the 2000s, urban renewal around the Expressway intensified and extensive repairs to the decades-old highway infrastructure became necessary. As a result, Waterfront Toronto and the City of Toronto jointly undertook a major Individual Environmental Assessment (EA) and Urban Design Study to determine the future of the eastern portion of the Expressway and Lake Shore Boulevard (from approximately Lower Jarvis Street to Leslie Street). Dillon was the lead consultant on this project.

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Rt. Hon. Herb Gray Parkway - Windsor / Essex, ON

The Rt. Hon. Herb Gray Parkway is the roadway component of the Detroit River’sNew International Trade Crossing. Federal, provincial and state governments in the United States and Canada partnered to find a solution that provides safe, efficient and secure movement of people and goods across the border. The project, previously called the Windsor Essex Parkway, has an anticipated capital cost of $1.6B (CDN) is being delivered as an Alternative Finance Procurement (AFP). Once complete the new parkway will provide uninterrupted traffic flow. This is the most significant highway investment being made in Ontario. 

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