Marie-Hélène Constantin
Partner | Montréal
Montréal: 514-982-4031

Marie-Hélène practises commercial law and advises clients in a variety of industries, including information technology, pharmaceutical and biotechnology companies. She regularly provides advice in relation to Internet, e-commerce, life sciences, privacy, marketing and advertising, and intellectual property matters.

Marie-Hélène assists corporations involved in the licence, sale, distribution and marketing of technology, goods and services to comply with Canadian legal requirements, including those specific to the province of Quebec. She has developed expertise in consumer protection issues related to online sales and regularly advises organizations on compliance with privacy, contests, language, labelling and other regulatory requirements.

Marie-Hélène's practice involves drafting complex commercial agreements relating to licensing, distribution, commercialization and transfer of technology, and advising clients on large technology-related corporate transactions.



  • Drafting and negotiating licensing, services and distribution agreements and other complex technology-related arrangements

  • Advising clients on technology, intellectual property and regulatory issues in the context of large technology-related corporate transactions

  • Advising retailers on e-commerce issues, including consumer protection and regulatory issues

Marketing & Advertising

  • Advising clients on marketing and advertising issues, including the review of various promotions, contest issues, online advertising and social media

  • Advising clients on language issues, including with respect to websites, signage, labelling and advertising

Life Sciences

  • Advising pharmaceutical, biotechnology and medical device manufacturers and distributors on regulatory, contractual and procurement issues


  • Reviewing privacy policies, consent forms, websites, insurance and financial services applications and other documents to identify privacy issues and drafting adequate data protection language

  • Advising clients on data transfer issues in the context of large corporate transactions (including patient information, customer information or employee information) and advising various organisations on cross-border data transfer issues


Marie-Hélène has been recognized as a leading lawyer in the following publications:

  • The Best Lawyers in Canada 2020 (Information Technology Law, Privacy and Data Security Law and Health Care Law)

  • The Best Lawyers in Canada 2019 (Information Technology Law and Privacy and Data Security Law)

  • The Best Lawyers in Canada 2019 (Lawyer of the Year - Health Care Law)

  • The Canadian Legal Lexpert Directory 2018 (Biotechnology and Computer & IT Law)

  • Who's Who Legal: Canada 2018 (Data)

  • Who's Who Legal: Canada 2017 (Telecommunications Media & Technology)

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Speaker: Overview of Canadian Personal Information Protection Legislation
Privacy Summit, Blakes Business Class Seminar, Montréal, Quebec, June 4, 2019.
Speaker: Rappel des meilleures pratiques pour la rédaction de contrats liés à la technologie - Contract Drafting Refresher: The Basics and Best Practices for Your Technology Agreements
Blakes Business Class Technology Seminar, Montréal, Quebec, February 6, 2019.
Speaker: Développements récents 2018 en TI en droit québécois
2018 CAN-TECH LAW 22nd Annual Conference, Montréal, Quebec, October 29, 2018.
Speaker: Highlights of Quebec Legislative Changes
Blakes Business Class Life Sciences Seminar, Toronto, Ontario, November 15, 2017.
Speaker: Preparing for the New Canadian Breach of Security Safeguards and EU Data Protection Rules
Blakes Business Class Seminar on Technology, Montréal, Quebec, October 3, 2017.
Co-speaker: L'essentiel sur la Charte de la langue française
Blakes Business Class Seminar on Technology, Montréal, Quebec, February 9, 2017.
Speaker: Stop Hackers from Taking a Byte: Cybersecurity and Responding to Data Breaches
Blakes Business Class Seminar on Technology, Montréal, Quebec, October 6, 2016.
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Quoted: Privacy Protections in the Data Rooms
Article by Sandra Rubin, Lexpert Online Magazine, November 13, 2017.
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