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Rebecca Hall-McGuire

Rebecca Hall-McGuire

Associate, Litigation

Contact Information

tel: 416.862.6738



Bar Admission

Ontario, 2015

  • Osgoode Hall Law School, J.D.
  • York University, M.E.S.
  • Queen’s University, B.Comm. (Honours)

Rebecca is a member of Osler’s Regulatory, Environmental and Aboriginal Law group, and is an associate in Osler’s Litigation Department. Rebecca has appeared before the Ontario Superior Court of Justice, and has experience in alternative dispute resolution.

Rebecca completed the joint J.D./M.E.S. program at Osgoode Hall and York University. She obtained her Honours Bachelor of Commerce from Queen’s University, which included an academic exchange to Toulouse Business School in France. While at law school, Rebecca was an active participant in the Alternative Dispute Resolution Program. Notably, she participated in client consultation competitions at the regional, national, and international level. Rebecca also represented Osgoode Hall at various lawyering competitions throughout North America.

Rebecca joined the firm as a summer student in 2013 and articled at the firm from 2014 to 2015. She returned to the firm as an associate in 2015.

    • Representing and advising the City of Toronto on Litigation, Construction Lien, and Procurement matters relating to the $500 million revitalization of Union Station, Canada’s busiest transportation hub.
    • KRIM Biopharma Inc., as well as its directors, with respect to the defence of a breach of contract and oppression claim brought by Stiefel Laboratories, Inc. in the Ontario Superior Court seeking $200 million in damages
    • Representing a major Canadian financial institution its defence of a breach of contract and negligence claim seeking over $200 million in damages.
    • Counsel for the plaintiff, a Canadian real estate company, in a multi-million dollar contaminated lands claim related to a commercial property contaminated by a neighbouring property. The plaintiff is seeking damages for remediation costs, and diminution in property value, among other costs.
    • Defending an international manufacturing company and Canadian importer and distributor, providing advice on strategic issues in the context of regulatory investigations and proceedings brought by federal and provincial environment regulators, as well as ongoing environmental compliance advice.
    • Assisting a global real estate developer in assessing environmental risk in respect of a potential acquisition of a brownfield property.
    • Defending a global remediation company from breach of contract litigation in the context of six different contaminated lands disputes.
    •  Defending an international manufacturing company from a neighbouring property owner’s claims relating to alleged migrating contamination.
    • Counsel to the plaintiff, an international investment company, in multi-party litigation regarding migrating contamination and remediation of contaminated lands.
    • Defending a pro bono client in a multi-party dispute involving an appeal to the Ontario Environmental Review Tribunal from an order by the Ontario Ministry of the Environment relating to alleged waste ash used as fill.

  • Recipient, Beard Winter LLP Prize for Trial Practice, Osgoode Hall Law School (2014)
  • Winner, Louis M. Brown and Forrest S. Mosten International Client Consultation Competition (2013)
  • Best Mediator, Great Lakes Mediation Tournament (2013)
  • Recipient, Jim MacNeill Award, Osgoode Hall Law School (2010)

  • Law Help Ontario, Small Claims Court Duty Counsel Volunteer (2014 – present)
  • Osgoode Hall Law School, Lawyer as Negotiator Teaching Team Member (2014 – 2015)
  • Osgoode Hall Law School, Dean’s Tutor (2013-2014)

  • Ontario Bar Association (elected to the Environmental Section Executive and acting as Newsletter Co-Editor from October 2017 - present)
  • The Advocates’ Society
  • Women’s Law Association
  • Canadian Bar Association

  • “Canada Targets Implementing a Comprehensive Ban on Asbestos and Asbestos-Containing Materials by 2018” by Jennifer Fairfax, Patrick G. Welsh, Rebecca Hall-McGuire, and Isabelle Crew, in  Key Developments in Environmental Law, 2017 edition.
  • The New Normal of Carbon Pricing: Province of Ontario, Canada, to Unveil a Cap-and-Trade System in an Effort to Reduce Greenhouse Gas Emissions” by Dan Kirby, Jack Coop, Richard King, Jennifer Fairfax, Patrick Welsh, and Rebecca Hall-McGuire, in the American Bar Association’s Climate Change, Sustainable Development, and Ecosystems Committee Newsletter, Volume 18, Number 3, August 2015.
  • NEB Trans Mountain Decision” by Richard King, Patrick Welsh, and Rebecca Hall-McGuire, Case Comment in Energy Regulation Quarterly, Volume 3, Issue 1, 2015.
  • “Governing Principles and Recent Trends in the Enforcement of Restrictive Covenants in Franchise Agreements” by Jennifer Dolman, Adam Ship, Rebecca Hall-McGuire, and Tyler Wentzell, in The Advocates’ Quarterly, Volume 43, Number 4, February 2015.
  • “Chapter 15: Powers of Investigation” by Michelle Lally and Kaeleigh Kuzma with the assistance of Rebecca Hall-McGuire, in Fundamentals of Canadian Competition Law (3rd ed.), 2015.
  • Ontario Superior Court of Justice Denies a Municipality’s Attempt to Effectively Prohibit Wind Turbines” by Lindsay Rauccio, Jack Coop, Jennifer Fairfax, and Daniel Kirby with the assistance of Rebecca Hall-McGuire, Osler Update, June 12, 2012.