Hélène Deschamps Marquis
Firm
308 Best Lawyers awards
Awarded Practice Areas
Biography
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.
Among other areas, her strategic advice to leadership covers:
- cyber governance
- risk assessment and mitigation, including privacy impact assessments
- regulatory compliance
- incident response plans and breach coaching
- AI tool planning and responsible deployment
- technology-related policies, procedures, and training
- the drafting of various technology agreements, including in contexts of electronic commerce, outsourcing, research and development, mergers and acquisitions, and financings
An active speaker and lecturer both in Canada and internationally, Hélène contributes to an innovative legal landscape in digital and technology law, privacy protection, and artificial intelligence ethics.
Firm
308 Best Lawyers awards
Overview
- English
- French
- English
- French
Client Testimonials
Awards & Focus

- Information Technology Law, Montréal, Canada (2026)
- Information Technology Law
- Privacy and Data Security Law
- Technology Law
News & Media
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