

Partner at Cassels Brock & Blackwell LLP
Thomas Isaac is a nationally recognized authority in Aboriginal law, providing expert legal counsel to business and government clients throughout Canada. With extensive experience in Aboriginal legal matters, regulatory compliance, consultation, litigation, negotiations, and constitutional issues, Thomas is known for delivering strategic, informed advice on complex Indigenous rights and reconciliation frameworks.
Serving as the Minister’s Special Representative to both the Minister of Indigenous and Northern Affairs and the Premier of the Northwest Territories, Thomas played a pivotal role in the development of Section 35 Métis Rights and Reconciliation Frameworks and approaches addressing landmark Supreme Court decisions. His expertise has been sought at the highest levels of government and across industries navigating relationships and negotiations with Indigenous communities.
Thomas authored the authoritative text Aboriginal Law, fifth edition, widely cited with approval by the Supreme Court of Canada and other courts. He has appeared before the Supreme Court of Canada and numerous courts and tribunals nationwide, representing clients in significant and precedent-setting cases. His in-depth knowledge, combined with practical litigation and negotiation experience, solidifies his reputation as a trusted advisor in Aboriginal legal matters.
Bar Admissions:
Alberta (2006); British Columbia (2001); New Brunswick (2001–07, 2021); Northwest Territories (2003); Ontario (2019); Saskatchewan (2019); Yukon (2010)
Recognition:
Honoured as one of Canada’s Top 25 Most Influential Lawyers by Canadian Lawyer Magazine in 2018.
Year Called to the Bar: 2001 (BC); 2006 (AB); 2003 (NT); 2003 (NU); 2001 (NB); 2010 (YK)
Phone: (604) 691-6108
Fax: (604) 691-6120
Email: [email protected]
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