Litigation: General Commercial
Canada Guide 2025 : Alberta
Band 2
Contact number
+1 403 260 7000About
Provided by Osler, Hoskin & Harcourt LLP
With active matters in all western provinces, Osler’s litigation group has strong expertise and a proven track record in Western Canada. The Western Canada Litigation Practice includes (i) Disputes / Litigation, (ii) Regulatory / Environmental / Indigenous / Land Litigation and (iii) Tax Litigation. Osler prides itself on its “one-firm” approach and its teamwork – within Western Canada, nationally, and among practice areas. Osler’s litigation team focuses on business-critical litigation and, in so doing, has become a recognized leader in corporate commercial, securities, governance, class action, energy, construction, tax, administrative, major projects, natural resources and renewable energy, indigenous, constitutional, and environmental law litigation.
Chambers Review
Osler, Hoskin & Harcourt houses a high-level commercial and energy industry disputes practice, rated for its strong bench of experienced litigators. The Calgary group has a solid track record in high-stakes breach of contract litigation, as well as experience in a range of other areas including class proceedings, securities litigation and shareholder disputes. The group has also represented clients in litigation relating to constitutional and administrative law. The team leverages the firm's strong national platform to provide high-quality advice on multi-jurisdictional files. Clients also benefit from the firm's complementary practices in regulatory and appellate litigation.
Work Highlights
- Osler, Hoskin & Harcourt acted as litigation counsel to Trans Mountain in all court proceedings relating to the Trans Mountain Expansion Project and its operations, including court challenges and opposition.
Strengths
Provided by Chambers
"The lawyers I work with have significant knowledge and experience in our industry so they can give guidance and insights into the situations we face."
"They have a very deep bench and can put the right number of people on any issue."
"Oslers have excellent lawyers and terrific litigators at all levels of court, including the Supreme Court of Canada. I appreciate the astute, practical advice and they are always timely and efficient."
"The lawyers I work with have significant knowledge and experience in our industry so they can give guidance and insights into the situations we face."
"They have a very deep bench and can put the right number of people on any issue."
"Oslers have excellent lawyers and terrific litigators at all levels of court, including the Supreme Court of Canada. I appreciate the astute, practical advice and they are always timely and efficient."
Notable Practitioners
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.
"Maureen is very responsive, very competent. eloquent in advocacy and gives good advice."
"Maureen is an excellent lawyer who can be tough and tactful simultaneously. She puts our interests first and finds a solution to meet the entire situation."
"Maureen is the best!"
Skilled corporate litigator Tristram Mallett is noted for his expertise with contentious securities and M&A mandates. He has also represented clients in product liability, privacy and contractual lawsuits, covering both single-plaintiff and class proceedings. He is based in Osler, Hoskin & Harcourt's Calgary office.
"Pleasure working with Tristan."
"Tristram has been terrific."
Olivia Dixon acts for clients in a range of commercial disputes, with a particular focus on energy litigation, construction litigation and international commercial arbitration. She is based in Osler, Hoskin & Harcourt's Calgary office.
"Olivia has a very effective way of handling ongoing litigation; she is super smart and I really enjoy working with her."
"Olivia is talented, bright and cost-effective. She puts in time where it's needed. I'd recommend her."
Ranked Lawyers at
Osler, Hoskin & Harcourt LLP
Alberta