Critical security studies is an established interest that brings together a variety of disciplines and theoretical approaches to bear on the ubiquitous deployment of security discourses and practices in the post-9/11 world. This article maps scholars working in critical security studies in Canada and addresses the potential of collaborative spaces for research of this community, particularly in contradistinction to the Paris and Copenhagen schools, as set out by the c.a.s.e. collective. Important issue clusters include: a concern with the post-colonial, particularly First Nations; environmental and ecological security, a network of issues surrounding the border, refugees, immigration, and multiculturalism; and human security, global governance, and intervention.