LAWYER PROFILE
Eileen M McMahon

Eileen M McMahon

Canada 2026

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Chambers ranking badge

Ranked in 3 practice areas

Contributions and articles

1 Articles, Press releases, highlights

About

Provided by Torys LLP

Canada

Practice Areas

Eileen is a co-founder of the intellectual property and food and drug regulatory practices at Torys. She represents the entire spectrum of companies on regulatory clearance and intellectual property protection of products. Across sectors—including life sciences (pharmaceuticals, medical devices, natural health products), agribusiness, consumer products and more—Eileen helps clients identify, protect and leverage IP and regulatory assets, obtain and maintain market exclusivity, handle high-risk situations (corrective actions, recalls, regulatory orders), and navigate the impact of current and proposed laws on clients’ ability to sell products. Eileen also has market-leading experience with patented medicines and oversight of Canada’s Patented Medicines Prices Review Board (PMPRB). Eileen also represents investors and companies looking to finance or invest in companies with intellectual property and regulatory assets, as well as companies looking to acquire or divest such assets.

Eileen’s unique experience and strong market presence are well recognized: in addition to her Band 1 ranking in Intellectual Property by Chambers & Partners, Eileen is the only Canadian lawyer to be recognized as a Star Individual in Life Sciences. Managing IP regards her as one of the world’s top 250 women in IP, and The Legal 500 recognizes her as one of Canada’s leading lawyers in intellectual property.

Eileen is a registered patent and trademark agent in the United States and Canada. She is also a Certified Licensing Professional of the Licensing Executive Society (LES).

Eileen is a former member of Torys’ Executive Committee.

Chambers Review

Provided by Chambers

Chambers Canada Guide

Life Sciences: Regulatory/Compliance - Nationwide - Canada

Star Individual
Star Individuals

Individual Editorial
Eileen McMahon enjoys a reputation as one of Canada's foremost life sciences lawyers and is considered a go-to expert by many major pharmaceutical companies. She assists with product regulations and licensing, as well as intellectual property. She is based in Toronto, from where she leads Torys' IP and food and drug regulatory practices.

Intellectual Property - Nationwide - Canada

Band 1
Band 1

Individual Editorial

Eileen McMahon has cultivated an outstanding reputation in the life sciences sector, with a knowledge base spanning issues from patent filing and prosecution to regulatory compliance and pricing.

Cannabis Law - Nationwide - Canada

Band 3
Band 3

Individual Editorial

Eileen McMahon draws upon her wealth of experience handling intellectual property and regulatory matters to provide support to cannabis sector clients. Based in Toronto, she is the chair of the law firm's IP and food and drug regulatory practices.

Strengths

Provided by Chambers

  • Eileen is a strong performer in all aspects.

    Life Sciences: Regulatory/ComplianceChambers Canada Guide
  • Eileen McMahon is commercially sound and wants to know what the clients want. She is a good communicator and has a great network.

    Life Sciences: Regulatory/ComplianceChambers Canada Guide
  • Eileen McMahon has unparalleled industry experience.

    Intellectual PropertyChambers Canada Guide
  • Eileen is commercially sound and wants to know what the clients wants. She is a good communicator.

    Intellectual PropertyChambers Canada Guide

Ranked Individuals at Torys LLP (156)

Alberta

Atlantic Canada

British Columbia

Nationwide - Canada

Articles, Highlights and Press Releases

1 item provided by Torys LLP

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