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Andrew Moeser listen


Andrew* is a versatile litigator. His practise is primarily focused on intellectual property litigation, but he is equally comfortable handling a judicial review or a contaminated property dispute. When it comes to complex issues, he gets it§ whether it’s a scientific study or a legal strategy. Possessing a master’s degree in biology and having worked as a coordinator of a phase III clinical trial, Andrew is that combination of litigator and scientist that brings a deep understanding to the issues facing our clients. He makes the situation right by knowing the client’s business and drawing on his diverse litigation experience to provide the fitting solution to any problem. .



Andrew Moeser (he/him)

is a partner at Lenczner Slaght.

"Andrew has honed his advocacy skills to a fine point and is a creative strategist with an ability to understand the industry at hand." — IAM Patent 1000

Andrew’s practice is primarily focused on intellectual property litigation. In patent matters, Andrew has experience with industries such as pharmaceutical and biologics, information technology, and oil and gas. In trademark, copyright, and trade secret matters, Andrew has represented clients in disputes relating to software, gaming, and beauty products. Andrew also has experience in commercial litigation relating to environmental contamination, and in judicial reviews in regulated industries such as pharmaceuticals and renewable energy.

Andrew has represented clients before all levels of court in Ontario, the Federal Court and Federal Court of Appeal, and the Alberta Court of Appeal.

He has also acted pro hac vice in proceedings in the United States and has extensive experience as part of international teams litigating large cross-border disputes.

Andrew is also an Adjunct Professor at the University of Toronto Faculty of Law, where he supervises a legal clinic providing assistance to the Structural Genomics Consortium, a not-for-profit public-private partnership that engages in precompetitive basic science research to facilitate and enable the discovery of new medicines.

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  • University of Toronto Faculty of Law - Adjunct Professor, Clinical Legal Education: Externship - Structural Genomics Consortium (2016 - present)

  • Intellectual Property Institute of Canada - Conference Committee (2021-present); CPD Committee (2021-present)

  • The Advocates’ Society

  • Canadian Bar Association

  • Ontario Bar Association

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  • Benchmark Canada (2024)

    Future Star

  • IAM Patent 1000 (2022-2024)

    Patent Litigation: Recommended Individual (Silver)

  • The Legal 500 Canada (2022-2024)

    Intellectual Property (Recommended Lawyer)

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