Osler’s National Disputes team advises on and solves business-critical issues for Canadian, as well as global, organizations.
Best known for handling multijurisdictional class actions and complex corporate/commercial litigation, we defend major institutional clients on high-profile (“bet-the-company”), precedent-setting cases across various industries and at all levels of courts in Ontario, Alberta, Québec, British Columbia and most other provinces, as well as in the Federal Court and the Supreme Court of Canada. We regularly appear in hearings before a variety of provincial and federal tribunals, such as the Financial Services Tribunal, the Ontario Municipal Board, the Environmental Assessment Board and the Ontario and Alberta Securities Commissions and represent clients in various forms of alternative dispute resolution.
While always ensuring our clients are litigation ready, we help our clients develop effective risk management strategies to proactively address potential exposures and mitigate the threat of complex litigation. However, when litigation is unavoidable, we defend our clients in a strategic, coordinated and cost-effective manner. Osler’s Dispute Resolution & Risk Management team has experience in all types of disputes including constitutional and public law, corporate governance, securities, defamation, energy and natural resource, environmental, franchise, consumer protection, intellectual property, privacy, pension and benefits, product liability, professional negligence, tax disputes and white-collar defence. We also leverage the expertise of Osler Works – Disputes, our specialized litigation support group composed of multidisciplinary professionals with dedicated expertise in legal technology, process improvement and management, project management and eDiscovery services.
Key Contacts
National Chair
Partner, Disputes, Toronto
Latest Insights
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Blog March 19, 2025
Judicial review of adjudication determinations in the Ontario Divisional Court
Recent decisions of the Ontario Divisional Court have addressed applications for judicial review of an adjudicator’s determination.
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Blog March 5, 2025
When are workplace investigation reports protected by solicitor-client privilege?
Whether a workplace investigation report is protected by solicitor-client privilege depends on the context in which it was prepared.
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Blog March 4, 2025
Supreme Court clarifies abuse of process in Aboriginal claims
A recent SCC decision clarifies the application of the abuse of process doctrine in cases involving Indigenous litigants and the duty to consult.
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Blog February 28, 2025
Hydro-Québec held liable under principle of honour of the Crown
The Québec Superior Court has reinforced the need for greater respect in negotiations between agents of the Crown and Indigenous communities.
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In the Media
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Osler News March 11, 2025
Maureen Killoran, KC, becomes a Fellow of the American College of Trial Lawyers
Osler is proud to announce that Maureen Killoran, KC, has become a Fellow of the American College of Trial Lawyers (ACTL), widely considered to be...
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Media Mentions February 14, 2025
Trump trade threat sparks call to finally harmonize capital markets regulation — the Financial Post
Serious trade threats coming from the U.S. make a strong case for revisiting a pan-Canadian model for improving this country’s capital markets...
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Media Mentions January 8, 2025
The push for electrification – Alberta Law Review
In an article for the Alberta Law Review, authors Deirdre Sheehan, partner and Co-Chair, Regulatory, Indigenous and Environmental; Vivek Warrier,...
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Osler News August 28, 2024
Four Osler partners recognized in Benchmark Canada’s ‘Top 100 Women in Litigation’ in 2024
Osler congratulates partners Maureen Killoran, KC, Mary Buttery, KC, Laura Fric and Teresa Tomchak for their inclusion in the 11th edition of...
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