Siobhan A.M. Goguen, QC

Contact Info


+1 (403) 260-3313


Calgary, Alberta

Siobhan practices in all areas of Canadian tax law with an emphasis on cross-border transactions. Appointed Queen’s Counsel in 2020, she is especially skilled at international tax planning, understanding the intricacies between the laws of each country.

Before becoming a lawyer, Siobhan earned her Certified Management Accountant designation and practiced accounting across a variety of industries.

Siobhan was called to the Alberta bar in 1998, after clerking with the Alberta Court of Appeal and Court of Queen’s Bench of Alberta. She received a Master of Laws (US Taxation) from Southern Methodist University in 2000.

Siobhan has been a partner with Felesky Flynn since 2004, acting as co-managing partner from 2016 to 2018. As an avid globetrotter, her multifaceted thinking offers a worldly perspective to tax law.

Siobhan has written and presented on numerous tax topics for the Canadian Bar Association, the Canadian Tax Foundation and the International Fiscal Association, while also serving a sessional instructor at the University of Calgary, Faculty of Law. She is recognized as a leading tax lawyer by The Best Lawyers in Canada™.



  • Called to the Alberta Bar, 1998
  • Clerked at the Alberta Court of Appeal and the Court of Queen’s Bench of Alberta
  • Master of Laws (LL.M), Southern Methodist University, 2000
  • Juris Doctor (JD), University of Calgary, 1997
  • Awarded the William A. McGillivray Gold Medal in Law

Memberships & Affiliations

  • Member, Law Society of Alberta
  • Member, Canadian Tax Foundation
  • Member, Calgary Bar Association
  • Member, Canadian Bar Association
  • Member, Canadian Petroleum Tax Society
  • Member of The Joint Committee on Taxation of The Canadian Bar Association and The Canadian Institute of Chartered Accountants

Publications & Presentations

  • Co-Presenter, “US Tax Reforms Relevant to Canadian MNEs”, IFA 2018 International Tax Conference, May, 2018
  • Co-Presenter, “Business Aspects of US Tax Reform”, Canadian Tax Foundation, March 2018
  • Moderator of “US Developments and Implications for Canadian Tax Planning” 2015 IFA International Tax Conference.
  • Co-Authored, “The OECD BEPs Initiatives: Where Do They Stand, Where Are They Going, and Why Should You Care”, Report of Proceedings of Sixty-Sixth Tax Conference, 2014 Tax Conference (Toronto: Canadian Tax Foundation, 2015), 26:1-32.
  • Co-Presenter, “Inbound Investment in a Changing Environment” Tax Executives Inc. 2014 Annual Conference.
  • Co-Presenter, “Permanent Establishment Update” 2013 IFA International Tax Conference.
  • Co-Authored, “Cross-border business restructuring”, International Fiscal Association, 2011 Paris Congress.
  • Co-Authored, “Selected Recent Legislative and Administrative Developments in the Foreign Affiliate Regime,” Report of Proceedings of Fifty-Ninth Tax Conference, 2007 Tax Conference (Toronto: Canadian Tax Foundation, 2008), 19:1-59.
  • “Foreign Affiliates: An Update on Selected Topics,” 2005 Prairie Provinces Tax Conference, (Toronto: Canadian Tax Foundation, 2005), 5:1-32.

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