Dajczer is professor of mathematics at the Instituto de Matematica Pura e Aplicada (IMPA), Rio de Janeiro, Brazil. He has made several important contributions in Riemannian geometry. His work has dealt especially with many aspects of the rigidity and deformation problem for isometrically or conformally immersed submanifolds in Riemannian ambient spaces. A member of the Brazilian Academy of Sciences, he has been a Guggenheim fellow and a fellow of the Japan Society for the Promotion of Science.