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Charles (Chuck) Birchall, B.A. (Hons.), LL.B., LL.M., is a partner at Willms & Shier Environmental Lawyers LLP and certified as an Environmental Law Specialist by the Law Society of Ontario. Chuck practices in the firm’s Ottawa office. Chuck has over 30 years’ experience devoted exclusively to environmental law with particular expertise in contaminated land/brownfields site remediation, environmental compliance and approvals as well as environmental assessment matters. Chuck advises clients across Canada, including environmental boards and tribunals respecting environmental assessment issues raised by mining, oil and gas and energy and infrastructure projects. He also advises on Indigenous law and consultation in the mining, infrastructure and energy sectors. Chuck has acted for Joint Review Panels conducting environmental assessments of oil sands projects in northern Alberta. Chuck defends clients being investigated or prosecuted for breaches of environmental laws and orders. Chuck also assists clients in managing environmental risk by providing advice on due diligence and compliance measures. He has extensive experience in preparing submissions and appearing on behalf of clients before Parliamentary Committees in the House of Commons and the Senate on proposed environmental legislation. Chuck is peer selected annually for inclusion in The Best Lawyers in Canada© for Environmental Law, and was named Best Lawyers 2013 “Lawyer of the Year” for Toronto Environmental Law. He is also named annually in both the International Who’s Who Legal: Canada for Environment and the International Who’s Who of Environmental Lawyers. Chuck is a frequent speaker at the Canadian Bar Association and other legal and industry conferences. Chuck is called to the Bar in Ontario, Nunavut and the Northwest Territories.


  • 123 Slater Street, Suite 700
    Ottawa, ON K1P 5H2


  • Osgoode Hall Law School, York University, LL.B., graduated 2005
  • Queens University , M.Sc., graduated 2001
  • Queens University , B.Sc. (Hons.), graduated 1998

Bar Admissions

  • Ontario, 2006

Lawyer of the Year Badge - 2013 - Environmental Law

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

  • Environmental Law, Toronto, Canada (2013)

Recognized in The Best Lawyers in Canada 2022 for work in:

  • Aboriginal Law / Indigenous Practice
  • Environmental Law

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