LAWYER PROFILE
Marie-Hélène Constantin

Marie-Hélène Constantin

Canada 2026

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Ranked in 1 practice area

About

Provided by Blake, Cassels & Graydon LLP

Practice Areas

Marie-Hélène practices commercial law and advises clients in a variety of industries, including information technology, pharmaceutical, biotechnology, product manufacturing and retail. She regularly advises organizations with respect to compliance with Canadian legal requirements, including those specific to the province of Quebec. Marie-Hélène’s expertise includes compliance with language legislation, consumer protection, electronic commerce and documents, privacy, antispam, and intellectual property matters, and the distribution and marketing of regulated products and services.

Doing business in Quebec raises a variety of unique issues, including in relation to the particularities of Quebec civil law, Quebec’s strict consumer protection regime and compliance with the French language requirements set out in Quebec’s Charter of the French Language, which language requirements extend to advertising through websites, social media, signage or other means. Quebec’s regulatory regime also imposes specific requirements with respect to advertising directed at children and to the marketing and advertising of certain regulated products or services. In the context of her practice, Marie-Hélène regularly advises organizations with respect to compliance with these requirements.

Her practice also involves drafting complex commercial agreements for the development, transfer, licensing, testing, supply, marketing and distribution of technology, including information technology, biotechnology and regulated products, interacting with relevant regulators and advising clients on regulatory aspects of corporate transactions. Marie-Hélène practices in both English and French.

Chambers Review

Provided by Chambers

Chambers Canada Guide

Advertising & Marketing - Nationwide - Canada

Band 3
Band 3

Individual Editorial
Marie-Hélène Constantin has a wide-ranging practice which includes significant strengths in privacy and advertising law, particularly in the technology and life sciences sectors, as well as notable expertise in advising on French language laws.

Strengths

Provided by Chambers

  • She is always extremely efficient and professional in conveying the often complicated legal requirements.

    Advertising & MarketingChambers Canada Guide
  • Marie-Hélène stands out with her knowledge of Québec French language laws.

    Advertising & MarketingChambers Canada Guide
  • Marie-Hélène is incredibly knowledgeable about any advertising and regulatory risks in Québec and is a great lawyer.

    Advertising & MarketingChambers Canada Guide

Ranked Individuals at Blake, Cassels & Graydon LLP (236)

Alberta

British Columbia

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