Amanda G. Manasterski

Amanda has a broad corporate commercial litigation and dispute resolution practice. Amanda has been an advocate for her clients in class actions, insolvency and restructuring, insurance coverage and defence, arbitrations, construction, and energy litigation.

Amanda has appeared before the Supreme Court of Canada, all levels of Court in Alberta, the Supreme Court of British Columbia, and the Supreme Court of Newfoundland and Labrador.

Amanda maintains an active pro bono practice and involvement in her community. She is a mentor for female law students with Calgary Women Studying Law Association (CWSLA) and Chair of the Canadian Bar Association – Civil Litigation (South). Amanda is also a former director of the Alberta Animal Rescue Crew Society (AARCS). Amanda is an avid diver and looks forward to volunteering with dive groups to clean up the ocean.

Prior to joining Osler, Amanda practised at another major Canadian law firm in Calgary.

Representative Work

*Notable matters prior to joining Osler

  • Counsel to Facebook, Inc. in a summary trial for a privacy class action in British Columbia; also representing Facebook in its defence of other proposed privacy class actions
  • Counsel to Teva Branded Pharmaceutical Products in several proposed class actions. Successfully opposed certification in a proposed class action (reported at Felker v. Teva Branded Pharmaceutical Products R, 2022 BCSC 1813)
  • Counsel to KingSett Mortgage Corporation in negotiations and enforcement of loan proceedings
  • * Counsel to Canada Bread Company, Limited in a proposed class action in the packaged bread industry alleging breaches of the Competition Act and various other economic claims (reported at Ravvin v Canada Bread Company, 2020 ABCA 287 and 2019 ABQB 686
  • * Counsel to the court-appointed receiver and foreign representative, Ernst & Young Inc., in the cross border (receivership/Chapter 15) proceedings of BOS Solutions Ltd., BOS Solutions Inc., BOS LeaseCo LLC, BOS Solutions Real Estate Inc. and BOS USHoldCo Inc. (oil and gas services and environmental solutions)
  • * Counsel to the lender in the Bankruptcy and Insolvency Act proceedings of Sundance Place II Ltd., Sundance Place II 1000 Limited Partnership by its General Partner Sundance Place II Ltd., et al as part of the Strategic Group CCAA proceedings
  • * Successfully represented two insureds in a precedent-setting case involving an insurer’s obligation to advise of the limitation period under the Fair Practices Regulation (reported at Statt v SGI Canada Insurance Services Ltd, 2019 ABQB 828)
  • * Advising insurer-side parties on coverage disputes involving COVID-19 business interruption loss, faulty design and workmanship exclusions, subrogation, peril exclusions, limitation periods, terrorism exclusions, as well as liability coverage in major industrial project works
  • * Represented domestic and international insurance market regarding coverage for tank failures in the Alberta Oil Sands
  • * Successfully represented AMEC Foster Wheeler in dismissing an 18-year old litigation (reported at Altex International Heat Exchanger Ltd v Foster Wheeler Limited, 2018 ABQB 620)
  • * Successfully represented Galvanic Applied Sciences Inc. before the Alberta Court of Appeal dismissing dissenting shareholders’ application for value determination of shares (reported at Morrison v. Galvanic Applies Sciences Inc., 2017 ABQB 514)

Latest Insights

  • Blog Apr 11, 2023

    Breaking the seal: BCCA recommends a procedure for media challenges to private proceedings

    The open court principle is essential to the rights of freedom of expression and freedom of the press, but is not unassailable. We discuss the...

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    Breaking the seal: BCCA recommends a procedure for media challenges to private proceedings
  • Osler Update Apr 8, 2022

    Give it your best shot(gun): Lessons from B.C. Court of Appeal decision on the irrevocability of ‘shotgun offers’

    Blackmore Management Inc. v. Carmanah Management Corporation illustrates the risks of a lengthy election period in a shotgun clause and the...

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Community Involvement

  • Chair, Canadian Bar Association – Civil Litigation (South)
  • Former Director, the Alberta Animal Rescue Crew Society (AARCS)
  • Volunteer Lawyer, Access Pro Bono

Speaking and Writing

Published Work

  • Co-Author: The Walking Dead: Recent Treatment of Rule 4.33 and Rule 4.31 of the Rules of Court, Alta Reg 124/2010, LESA Rules of Court Conference, Calgary, Alberta, April 20, 2017



  • The University of Calgary, J.D.
  • The University of Calgary, B.A., with distinction


  • English

Professional Affiliations

  • Law Society of British Columbia
  • Law Society of Alberta
  • Canadian Bar Association
  • Advocates’ Society