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.
Areas of Focus
Key Contacts
National Chair
Partner, Disputes, Toronto
Latest Insights
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Blog October 30, 2025
Ontario court reaffirms that compensable loss is a ‘fundamental prerequisite’ to certification of a class action
The Court denied certification to a proposed class action, finding that such a proceeding was not the preferable procedure.
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Blog October 14, 2025
The longest trial, a big impact: Cowichan’s Aboriginal title victory
A landmark decision in B.C. has created uncertainty for governments, fee simple landowners and Indigenous communities with overlapping title claims.
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Osler Update October 14, 2025
Simplifying the execution of notarized obligations: a new mechanism under Québec law
A recently introduced draft regulation marks significant changes to the current framework in Québec.
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Blog September 30, 2025
A rare common sense win for employers in Ontario: Li v. Wayfair
Employers should regularly update their employment agreements to ensure the language reflects the latest case law developments.
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Media Mentions October 8, 2025
Business litigators say Ontario’s proposal to shorten litigation dispute timelines is problematic – Canadian Lawyer
Recently proposed amendments to the Rules of Civil Procedure have prompted concern from lawyers in Ontario. In an effort to improve the provincial...
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Media Mentions October 6, 2025
Nov. 1 deadline fast approaching for B.C. employers – HR Reporter
To continue to attract top candidates, employers must be prepared to address whatever their pay transparency report reveals, says Katy Allen,...
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Media Mentions September 23, 2025
2025’s Top Franchise Legal Players: Jennifer Dolman – 1851 Franchise
Jennifer Dolman, partner in Osler’s Disputes practice, has been recognized by 1851 Franchise as one of the Top Franchise Legal Players for 2025.
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Osler News September 22, 2025
Katy Allen joins Osler’s Employment and Labour Group as a partner
Osler welcomes Katy Allen, who joins the firm’s Vancouver office.
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