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Marc McAree, B.A. (Hons.), LL.B., M.E.S., is a partner at Willms & Shier Environmental Lawyers LLP and certified as a Specialist in Environmental Law by the Law Society of Ontario.Marc provides advice and solutions to a wide range of clients to overcome their environmental law and litigation issues. Marc has significant environmental law expertise in contaminated land/brownfields clean ups, transactions and litigation, and environmental compliance and approvals. Marc also helps clients reduce and manage environmental risks and liabilities.Marc is recognized for his excellence representing clients in environmental civil litigation at all levels of Ontario Courts, defence of clients against environmental regulatory prosecutions, and appearances before Ontario’s Environmental Review Tribunal and other administrative law decision-makers on appeals and other hearings. Marc has particular experience litigating soil and groundwater contaminant impacts, nuisance and odour issues.Marc is named in the 2022 Lexpert/American Lawyer Guide To The Leading 500 Lawyers in Canada. He is peer selected annually for inclusion in the Best Lawyers in Canada for environmental law. Marc was named “Environmental Lawyer of the Year” for 2019 in Toronto by the Best Lawyers in Canada. Marc is also ranked “Most Frequently Recommended” by the Canadian Legal Lexpert Directory and ranked “AV Preeminent” by peers in Martindale-Hubbell. He is also named annually in both the international Who’s Who Legal—Environment and Who’s Who Legal—Canada. Marc is called to the Bars of Ontario and British Columbia.


  • 1 Toronto Street, Suite 900
    Toronto, ON M5C 2V6


  • English

Lawyer of the Year Badge - 2019 - Environmental Law

Named "Lawyer of the Year" by Best Lawyers® for:

  • Environmental Law, Toronto, Canada (2019)

Recognized in The Best Lawyers in Canada 2023 for work in:

  • Environmental Law
  • Municipal Law

Rankings and Awards

Rankings and Awards
  • Certified Specialist in Environmental Law, Law Society of Upper Canada, since 2004
  • Selected for inclusion in the 2015 and 2016 Lexpert™®/American Lawyer Guide To The Leading 500 Lawyers in Canada
  • Peer selected annually for The Best Lawyers in Canada©—Environmental Law
  • Rated “Consistently Recommended” in the Canadian Legal Lexpertdirectory
  • Named annually in the international Who’s Who Legal—Environment andWho’s Who Legal—Canada
  • Ranked “AV® Preeminent™” by peers in Martindale-Hubbell
  • Recipient, Linda Adlam Manning Award for Volunteerism, Ontario Bar Association, 2009

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