Perimeter Institute for Theoretical Physics invites applications for postdoctoral positions in the areas of quantum gravity, string theory, quantum information, cosmology, quantum foundations and particle physics. We will consider applications in all of these areas. Exceptional applicants in related areas, such as condensed matter physics, are encouraged to apply. The postdoctoral positions are normally for a period of three years. Outstanding candidates may also be considered for a senior postdoctoral position with a five-year term.