He is also a member of the McGill Centre for Human Rights and Legal Pluralism, an Associate Member of the McGill School of Environment, and a Faculty Associate of the Governance, Environment & Markets Initiative at Yale University. His research focuses on legal and policy solutions to complex environmental and social problems that cut across multiple fields and levels of governance. His areas of interest include sustainable development, transnational law, public policy, environmental law and governance, climate change, human rights, disability, social innovation, and socio-legal research. Sébastien currently serves as a principal investigator for research grants awarded by the Social Sciences and Humanities Research Council of Canada and the Fonds québécois de recherche société et culture.