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Mary M. Thomson
Partner, Practice Area Leader for Litigation & Dispute Resolution

Speaks: English

Year of Call: 1983 - Ontario

Primary Office: Toronto

Mary M. Thomson

One of Canada’s pre-eminent litigators, Mary Thomson serves as head of Gowling WLG's firm-wide Advocacy Group and leader of its Product Liability Group. Over the past three decades, she has represented clients in many of the country’s highest-profiled legal matters in her field of expertise, including class actions and mass tort litigation, public inquiries, and before administrative tribunals. She has appeared in courts across Canada on matters involving product liability, particularly involving pharma and medical devices as well as consumer products generally. She is a recognized expert in health law, consent law, privacy law and related matters.

Mary has been repeatedly singled out as a top legal practitioner by Chambers Canada, Canadian Legal Lexpert Directory, Who’s Who Legal and other leading directories. In 2013, she was awarded the prestigious Lexpert Zenith Award for her extraordinary leadership in the legal profession.

In addition to her legal practice, Mary has taught trial advocacy and negotiation theory throughout her career. For more than a decade, she was an adjunct professor in the graduate department of the Faculty of Medicine at the University of Toronto, instructing in ethical and legal issues related to health law. She currently serves as chair of Outward Bound International, having been Chair of Outward Bound Canada previously. She has chaired the Selection Committee (ON) for Pearson College, a United World College, for many years.


Featured insights & resources

Memberships

Career & Recognition

2015

December 2015

Who’s Who Legal: Canada 2015

2015

December 2015

Lexpert/ROB Special Edition on Canada’s Leading Litigation Lawyers

2015

November 2015

Chambers Canada 2016

2015

November 2015

Expert Guides: Women in Business Law 2015

2015

October 2015

LMG Life Sciences 2015

2015

September 2015

The Best Lawyers in Canada 2016

2015

September 2015

The International Who’s Who of Business Lawyers 2015

2015

July 2015

Benchmark Litigation's Top 25 Women in Litigation (Canada) 2015

2015

July 2015

Canadian Legal Lexpert Directory 2015

2015

May 2015

Who’s Who Legal: Life Sciences 2015

2015

April 2015

Benchmark Canada: The Definitive Guide to Canada’s Leading Litigation Firms & Attorneys 2015

2014

December 2014

Lexpert recognizes Gowlings professionals as leading litigation lawyers

2014

November 2014

LMG Life Sciences 2014

2014

November 2014

Expert Guides: Women in Business Law 2014

2014

October 2014

Who's Who Legal: Canada 2014

2014

September 2014

Benchmark Litigation's Top 25 Women in Litigation (Canada)

2014

September 2014

The Best Lawyers in Canada 2015

2014

September 2014

Who’s Who Legal: The International Who’s Who of Business Lawyers 2014

2014

July 2014

Canadian Legal Lexpert Directory 2014

2014

April 2014

Who's Who Legal: The International Who's Who of Life Sciences Lawyers 2014

2014

April 2014

Benchmark Canada: The Definitive Guide to Canada’s Leading Litigation Firms & Attorneys 2014

2013

December 2013

Expert Guides: Women in Business Law 2013

2013

December 2013

Lexpert 2013 Guide to the Leading US/Canada Cross-border Litigation Lawyers in Canada

2013

November 2013

Who's Who Legal: Canada 2013

2013

September 2013

Who's Who Legal: The International Who's Who of Product Liability Defence Lawyers 2013

2013

September 2013

The Best Lawyers in Canada 2014

2013

August 2013

LMG Life Sciences 2013

2013

July 2013

Who’s Who Legal: The International Who’s Who of Business Lawyers 2013

2013

July 2013

Canadian Legal Lexpert Directory 2013

2013

March 2013

Benchmark Canada 2013

2013

February 2013

The Best Lawyers in Canada® 2013

2012

December 2012

Who's Who Legal: Canada 2012

2012

December 2012

2012 Lexpert® Guide to the Leading U.S./Canada Cross-Border Litigation Lawyers

2012

July 2012

Canadian Legal Lexpert Directory 2012

2012

July 2012

Who’s Who Legal: The International Who’s Who of Business Lawyers 2012

2012

June 2012

PLC Which Lawyer? 2012

2012

April 2012

Benchmark Canada 2012

2012

February 2012

Lexpert®/American Lawyer Guide to the Leading 500 Lawyers in Canada 2012

2012

February 2012

The Best Lawyers in Canada 2012

2011

December 2011

Who’s Who Legal 2011

2011

May 2011

Who’s Who Legal - The International Who’s Who of Business Lawyers , 2011

2011

March 2011

PLC Which Lawyer? 2011

2011

February 2011

The Best Lawyers in Canada® 2011

2011

February 2011

Canadian Legal Lexpert Directory , 2011

2010

February 2010

Canadian Legal Lexpert Directory , 2010

2010

February 2010

Expert Guides, 2010

2010

February 2010

PLC Which Lawyer? Yearbook , 2010

2010

February 2010

The Best Lawyers in Canada® 2010

2010

2010

Who's Who Legal, Product Liability Defence

1983

1983

Year of Call, Ontario

1981

1981

Queen's University, LLB

1980

1980

University of New Brunswick, MA

1977

1977

University of New Brunswick, BA (Hons.)

Fellow, Litigation Counsel of America

Mary Thomson
Profile highlights

#
Mary Thomson

One of Canada’s pre-eminent litigators, Mary Thomson serves as head of Gowling WLG's...

Memberships

Mary Thomson
Profile highlights

#
Mary Thomson

One of Canada’s pre-eminent litigators, Mary Thomson serves as head of Gowling WLG's...

Insights & Resources

EXTERNAL PUBLICATIONS &
PAST SPEAKING ENGAGEMENTS

Mary has authored a number of articles and papers on a variety of topics, including contributing a chapter to Law and Ethics in Biomedical Research: Regulation, Conflict of Interest, and Liability, published by University of Toronto Press, 2006, and Lies, Damned Lies and Statistics: The Use of Statistical Evidence in Criminal and Civil Law, published in the proceedings of the Canadian Institute for the Administration of Justice, 2000.

Mary is a sought-after speaker in her areas of legal expertise.

Client Work

Class Actions

  • Lead counsel for a major pharmaceutical client with respect to a diabetes medication.
  • Lead counsel for the manufacturer of a leading dental adhesive.
  • Lead counsel for major standards organization with respect to modular home claims.
  • From 2004 to 2009, lead counsel for a major pharmaceutical client with respect a leading coxib medication.
  • Lead counsel and national coordinating counsel for a major pharmaceutical client with respect to bisphosphonate litigation based in Saskatchewan.
  • Lead counsel for a leading energy drink manufacturer.
  • Lead counsel in a tuberculosis notification case including successfully defeating plaintiffs' claims for mental distress.
  • Lead counsel on a major privacy breach class action for a public entity.
  • Senior counsel to local litigation teams on diagnostic-related class actions, responsible for strategy and outcomes on class certification matters.

Mass Torts

  • Counsel to all physicians in Canada with respect to Krever Inquiry and "blood litigation" throughout the 1990s.
  • Trial counsel on Canadian litigation involving transfusion associated AIDS and related HBV, HCV claims.
  • Responsible for product recall and patient notification regarding surgical instrumentation and possible transmission of infectious diseases.
  • Act for a number of manufacturers of medical devices and pharmaceutical products with respect to threatened litigation.

Mary Thomson
Profile highlights

#
Mary Thomson

One of Canada’s pre-eminent litigators, Mary Thomson serves as head of Gowling WLG's...

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Medical Defence & Health Law

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Product Liability

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Privacy & Data Protection

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Food & Beverage

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Life Sciences

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