Hélène Deschamps Marquis

Partner, AI Practice Lead and National Co-Leader, Privacy & Cybersecurity

Montréal
HDeschampsMarquis@blg.com
514.954.3102

Hélène has over 25 years of market-leading experience in advising many of Canada’s major institutions on managing complex legal and business risks, in respect of cybersecurity, information technology, privacy, and artificial intelligence. Her practice includes breach and incident response, regulatory compliance, and global data and privacy frameworks, as well as the negotiation of complex cross-border technology arrangements and transactions.

Hélène excels at assisting board members and general counsel grasp complex IT issues and related regulatory requirements, hence contributing to organizational resilience through informed decision-making. Her clients span multiple sectors, including energy, financial services, public sector, health care, and transportation.

Beyond Our Walls

Professional Involvement

  • Member, Law Society of Ontario
  • Member, Barreau du Québec
  • Board member, Canadian Internet Registration Authority (CIRA)
  • Board and Executive Committee member, ITech Law
  • Instructor (Board liability and cyber risks), Collège des administrateurs du Québec

Awards & Recognition

  • Recognized in the 2025 edition (and since 2014) of Best Lawyers in Canada (Information Technology Law; Technology Law).
  • Recognized in the 2025 edition of The Canadian Legal Lexpert Directory (Technology Transactions) and since 2013 (Computer & IT Law; Data Protection & Privacy).
  • Recognized in the 2025 edition (and since 2024) of The Lexpert® Special Edition on Canada’s Leading Technology Lawyers.
  • Recognized in the 2024 edition of The Lexpert® Special Edition on Canada’s Leading Health Sciences Lawyers.
  • Recognized in the 2024 edition (and since 2016) of the Who’s Who Legal: Canada (Telecommunications Media & Technology; Information Technology and Data).
  • Recognized in the 2024 edition (and since 2019) of the Who's Who Legal's Thought Leaders: Data.

Bar Admission & Education

  • Ontario, 2024
  • Québec, 1998
  • LLM, International Business and Technology Law, McGill University, 2000
  • LLB, Université Laval, 1996