Alejandro Adem is an internationally recognized mathematical scientist and scholar, and one of Canada’s foremost experts in the field of algebraic topology. He has made important theoretical and calculational contributions to the cohomology of groups and topological symmetries, successfully applying them to solve long-standing conjectures. Through his versatile approach, Adem has opened fertile lines of research connecting areas such as representations, homotopy theory, orbifolds, and aspects of mathematical physics.