• LLB, 1985
    University of New Brunswick
  • BSc, Neurobiology, 1981
    McGill University

Year of Call/Admission

  • Ontario, 1987

Languages Spoken

  • English
  • French

Clifford Sosnow

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+1 416 865 5165
+1 416 364 7813 (fax)
+1 613 696 6876
+1 613 230 6423 (fax)

Clifford Sosnow is a Partner practising out of Fasken Martineau’s Ottawa and Toronto offices. He is known for the advice he provides leading corporations, governments and industry associations on anti-bribery and corruption, global trade and investment issues.

Clifford regularly advises clients on anti-bribery, sanctions and export control compliance audits, regarding best practice internal policies and in performing related transactional due diligence. He litigates respecting anti-dumping disputes, free trade agreements, bilateral investment agreements, World Trade Organization (WTO) law, and procurement challenges. He is recognized as a leading international trade law practitioner in Chambers Global: The World's Leading Lawyers for Business, The Canadian Legal Lexpert Directory, The International Who's Who of Trade & Customs Lawyers, Legal 500 Canada, and Guide to the World's Leading International Trade Lawyers.

Clifford has appeared before North American Free Trade Agreement (NAFTA) and WTO panels, the Canadian International Trade Tribunal (CITT) and the Federal Court of Appeal.

Clifford is regularly sought after to provide comment to the media. He is often quoted for his anti-dumping and corruption, international trade and customs law expertise and has been mentioned in publications, including Bloomberg TV, the Canadian Broadcast Corporation, The Toronto Globe and Mail, the National Post, Lexpert Magazine, The Lawyers’ Weekly and Law Times.

Clifford holds leadership and executive committee positions in many professional associations, writes extensively on matters involving anti-bribery, international trade and investment issues, and is often invited to speak or act as moderator at conferences around the world.

Clifford, who previously clerked at the Federal Court of Canada, also previously served as senior government counsel with the trade law division of Global Affairs Canada. He has extensive experience representing companies in trade issues involving Canada and other countries. Clifford was also in-house counsel to the Canadian International Trade Tribunal, which is Canada’s anti-dumping, customs and procurement tribunal, and has represented Canada in several NAFTA and WTO disputes.

Clifford is the recipient of the Golden and Diamond Jubilee Medals of Queen Elizabeth II.

Honours and Awards

  • Chambers Global 2017 International Trade/WTO (Canada)
  • Who's Who Legal Canada: 2016 for Trade & Customs
  • The Canadian Legal Lexpert Directory 2015-2017 for International Trade
  • Who's Who Legal 100 (Trade & Customs)
  • Legal 500 Canada (Leading Lawyer in International Trade)
  • Chambers Global: The World's Leading Lawyers for Business (International Trade/WTO)
  • Chambers Canada 2018 for International Trade/WTO
  • The Best Lawyers® in Canada 2009-2018 for International Trade and Finance Law
  • Law Business Research's The International Who's Who of Business Lawyers (Trade & Customs)
  • Law Business Research's Who's Who Legal: Canada (Trade & Customs)
  • Legal Media Group's Guide to the World's Leading International Trade Lawyers
  • Expert Guide’s: Best of the Best, Global (International Trade and Shipping)
  • Expert Guide’s: Best of the Best, Global 2017 (International Trade)
  • Lexpert Guide to the Leading US/Canada Cross-Border Litigation Lawyers in Canada


  • Division Chair, Public International Law, American Bar Association International Law Section
  • Vice-Chair, Inter-Pacific Bar Association, Dispute Resolution & Arbitration Committee
  • Chair Emeritus, Inter-Pacific Bar Association, International Trade Law Committee
  • Chair, Business and Industry Advisory Committee to the Organisation for Economic Co-operation and Development Trade Committee
  • Co-Chair, Canadian Chamber of Commerce, International Affairs Committee
  • Editorial Board, Kluwer Law International's Global Trade and Customs Journal
  • Member, Transparency International (Canada), Legal Committee
  • Member, Prospectors and Developers Association of Canada
  • Member, Customs and International Trade Bar Association
  • Past Chair, Canadian Bar Association, International Law Section
  • Past Vice-Chair, Canadian Association of Importers and Exporters
  • Board Member, Ontario Division, Multiple Sclerosis Society, 2010-2012