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Privacy and Data Security Disputes

Privacy is a business-critical issue for all companies, both domestic and international – and is becoming ever more so. When your reputation and bottom line are at stake, you need not only expert privacy lawyers, but also a leading privacy litigation team in Canada in your corner.

That’s why social media giants like Facebook and TikTok, as well as established national and international corporations, all turn to Osler for representation on their privacy matters.

A rapidly evolving space

Data breaches. Ransomware attacks. Cybersecurity risks. As threats to Canadians’ privacy continue to multiply – often with potentially devastating commercial consequences – privacy-related investigations and litigation are becoming more and more prevalent. It is essential to put the necessary measures in place to mitigate these risks, and our decades of experience handling actual or threatened litigation and investigations in this space have demonstrated that involving privacy litigation experts from the beginning significantly improves outcomes.

Experience that goes above and beyond

For every matter where privacy or sensitive information is at risk, Osler’s market-leading privacy group works hand in glove from the outset with a member of Osler’s dedicated privacy litigation team to provide necessary strategy for minimizing risk and cost.

Be it regulatory investigations, or defending individual, group, or privacy class actions, or for other litigation – our expert team has you covered.

The expertise you need to drive results

Our fully integrated team is comprised of industry-leading privacy and litigation lawyers from across the country. Individually, they bring deep insight, exceptional talent and valuable experience to every matter. Collectively, they are a combination without equal:

These principal team members are joined by the expertise of Robert CarsonDeborah GlendinningGeoffrey HunnisettDavid Rankin, and Lauren Tomasich, litigation partners in our Toronto office; Kristian Brabander, a litigation partner based in Montréal; Tommy Gelbman, a litigation partner practising out of Calgary; and Vancouver-based litigation partner, Emily MacKinnon.

Key Contacts

Mark A. Gelowitz

Partner, Disputes, Toronto

Sonia Bjorkquist

Partner, Disputes, Toronto

Christopher Naudie

Partner, Disputes, Toronto

Mary Buttery, KC

Partner, Disputes, Vancouver


Representative Work


Latest Insights

  • Osler Update Mar 4, 2022

    Ontario appellate court affirms denial of certification in Cambridge Analytica class action

    Ontario’s Divisional Court dismissed an appeal from an order denying certification of a putative privacy class action against Facebook, joining a...

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    Ontario appellate court affirms denial of certification in Cambridge Analytica class action
  • Webinar Nov 30, 2022

    AccessPrivacy Monthly Call: Data litigation roundtable: litigation risk associated with data breaches and data misuse

    The webinar provides privacy professionals with expert analysis and insights into emerging issues and notable developments in the privacy and...

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    AccessPrivacy Monthly Call: Data litigation roundtable: litigation risk associated with data breaches and data misuse
  • Osler Update Jun 28, 2024

    Canada introduces sweeping bill to mandate tech and data interoperability in healthcare

    On June 6, 2024, the federal Minister of Health introduced Bill C-72 — An Act respecting the interoperability of health information technology and...

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    Canada introduces sweeping bill to mandate tech and data interoperability in healthcare
  • Report May 7, 2024

    Privacy Jurisprudence Review

    Osler's semi-annual Privacy Jurisprudence Review is intended to help busy in-house counsel, Chief Privacy Officers and compliance professionals...

    Read more
    Privacy Jurisprudence Review
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In the Media

  • Osler News May 21, 2024

    Prominent privacy lawyers Éloïse Gratton and François Joli-Coeur join Osler’s market-leading national Privacy and Data Management practice

    Osler is pleased to welcome prominent privacy law practitioners Éloïse Gratton and François Joli-Coeur to the firm’s market-leading national...

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    Prominent privacy lawyers Éloïse Gratton and François Joli-Coeur join Osler’s market-leading national Privacy and Data Management practice
  • Media Mentions Sep 20, 2023

    Federal parties look poised to use new law to fight B.C. privacy regulations, court documents indicate – The Hill Times

    Adam Kardash says in an interview that the argument federal political parties are making that they should be exempt from B.C.’s privacy laws is...

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  • Osler News Nov 24, 2022

    Osler welcomes Kristian Brabander to the Litigation team in Montréal

    Kristian Brabander has joined Osler’s Litigation team in Montréal, with extensive experience in a wide range of litigation matters, including...

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  • Osler News Nov 23, 2022

    The class actions certification pendulum is swinging back, say lawyers – Lexpert

    After showing a “great willingness to certify” class actions, Canadian courts are increasingly looking for “some meat in the action.” Osler...

    Read more
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