Lenczner Slaght
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Toronto dispute resolution boutique Lenczner Slaght houses a growing contentious construction practice, which added nine new clients in 2024/25. The group acts for an impressive roster of construction companies, developers, project owners and insurers on the full range of judicial and arbitral proceedings, with a strong record in claims related to large-scale transport projects. Andrew Parley, who is also a qualified engineer, anchors a team that includes high-profile trial lawyer Matthew Sammon and newly promoted partner (January 2025) Aaron Grossman.
Legal 500 Editorial commentary
Key clients
- Green Infrastructure Partners Crosslinx Transit Solutions Constructors Aecon Mining Construction Services, a Division of Aecon Construction Group Easton’s Group (Dr. Steve Gupta) Dineen Construction Corporation Zurich Insurance Company Yorkville East Developments Lifetime Developments Tarion Warranty Corporation Steelcon Fabrication Great Gulf Canada Menkes Developments and Bay Yorkville Developments Watershed Solutions Harlo Capital EllisDon Group of Companies Northbridge General Insurance Corporation Bird-Design Build Construction AtkinsRéalis (formerly SNC Lavalin)
Work highlights
Represented AtkinsRéalis in a claim brought by Pomerleau connected to the Trillium Line Extension Ottawa, Stage 2 LRT Project.

