About

Provided by Osler, Hoskin & Harcourt LLP

Osler's National Litigation and Dispute Resolution 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.


Chambers Review

Provided by Chambers

Disputes (International & Cross-Border) - Canada

2
Band 2

What the Team is Known For

Osler, Hoskin & Harcourt is a strong independent Canadian law firm with full-service abilities and expertise across key domestic markets, offering global reach through a New York presence and a well-maintained network of partner firms. The law firm has a robust reputation domestically and is a strong brand in US and international markets, with a stellar track record in cross-border transactions. The law firm is a market leader in the energy space, providing regulatory expertise and deal capabilities for major oil and gas players internationally. It also provides contentious teams well versed in general commercial litigation as well as class actions.

Across Canadian locations, the firm offers broad contentious capabilities centred on serving its corporate client base. Its teams are well versed in energy disputes relating to foreign clients’ assets and operations in Canada, as well as in representing Canadian oil and gas clients in international disputes and arbitration relating to foreign-held assets and projects. The class action and product liability groups also display proficiency in cross-border matters, often acting for companies in the pharmaceutical industry on the Canadian aspects of multi-jurisdictional cases. Aided by its New York presence, the law firm is well positioned for commercial litigation, including in relation to securities and tax.

Strengths

Provided by Chambers

Notable Practitioners

Provided by Chambers

Mark A Gelowitz
2
Mark A Gelowitz
2
Band 2

Mark Gelowitz has experience handling a broad range of disputes, including those in the technology, insurance, real estate and PE sectors. Based in Osler, Hoskin & Harcourt's Toronto office, he is additionally instructed for his representation in class action proceedings.

He is very capable and client-focused.

Lauren Tomasich
3
Lauren Tomasich
3
Band 3

Lauren Tomasich is commended for her arbitration practice. She advises on domestic and international proceedings.

Lauren Tomasich is respected by her peers and known as a careful, strategic thinker and a fighter in the hearing room.

Maureen Killoran KC
3
Maureen Killoran KC
3
Band 3

Maureen Killoran KC is recognised for her handling of major litigation files in the energy and natural resources sector. Her experience includes representing both public bodies and private clients in constitutional challenges, appellate proceedings and judicial reviews, alongside her commercial dispute resolution practice. She is Osler, Hoskin & Harcourt's national co-chair and splits her time between the Calgary and Vancouver offices.

She is one of the best litigators in Canada.

Maureen Killoran is a top-notch litigator.

She is a superb lawyer.

Sonia Bjorkquist
3
Sonia Bjorkquist
3
Band 3

Sonia Bjorkquist is based in Osler, Hoskin & Harcourt's Toronto office. She regularly acts for clients in the energy and infrastructure sectors. Sonia is also the chair of the firm's national disputes department.

Sonia is fabulous with strategy.

She is always meticulously prepared. Sonia Bjorkquist brings a thorough mastery of all aspects of her case to bear on her advocacy.

Ranked Lawyers at
Osler, Hoskin & Harcourt LLP

Provided by Chambers
Filter by
Band

Canada

Dispute Resolution: Arbitration

Lauren Tomasich
3
Lauren Tomasich
3
Band 3
Sonia Bjorkquist
3
Sonia Bjorkquist
3
Band 3
Dispute Resolution: Litigation

Mark A Gelowitz
2
Mark A Gelowitz
2
Band 2
Maureen Killoran KC
3
Maureen Killoran KC
3
Band 3

Members

Provided by Osler, Hoskin & Harcourt LLP