For over two decades, he has been involved in international standard-setting processes, including those relating to the United Nations Declaration on the Rights of Indigenous Peoples, the draft American Declaration on the Rights of Indigenous Peoples, and the Indigenous and Tribal Peoples Convention, 1989. In 1998, he was involved in the Québec secession referendum, acting on behalf of the Grand Council of the Crees (Eeyou Istchee) before the Supreme Court of Canada. He is a member of the Québec and Ontario bars.​​