
The Toronto-centred team at Cassels Brock & Blackwell LLP advises on major construction projects and high-value disputes for a broad mix of project sponsors, public-sector agencies, crown corporations and private contractors. Sector specialist Matthew Alter is highly sought after for complex construction disputes, where he routinely represents clients in the infrastructure, mining, energy and higher education sectors on judicial and arbitration proceedings. Department chair Mark St. Cyr handles both front-end and contentious construction matters, with experience spanning the full range of design, financing, procurement and construction. Also recommended are Graham Brown, who sits in the construction and litigation groups; and newly promoted partner (January 2025) Stephanie Garraway, who focuses on front-end construction work.
Legal 500 Editorial commentary
Key clients
- Metrolinx
- Infrastructure Ontario
- University of Toronto
- Michael Garron Hospital
- Ontario Northland Transportation Commission
- Toronto Community Housing Corporation
- Brock University
- Soletanche Bachy International
- Bank of Nova Scotia
- County of Northumberland
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Mark St. Cyr
Other key lawyers
Matthew Alter; Graham Brown; Stephanie Garraway; Zach Flemming-Giannotti

