Krier studied architecture at the Technical University of Munich from 1959 to 1964. After graduating, he worked with Oswald Mathias Ungers in Cologne and Berlin (1965–66) and Frei Otto in Berlin and Stuttgart (1967–70). From 1973 to 1975, he was an assistant in the school of architecture at the University of Stuttgart.
Krier's architectural education took place at the Technical University of Munich (1959-1964), followed by his professional journey working under renowned architects in Cologne, Berlin, and Stuttgart. He then served as an assistant professor at the University of Stuttgart from 1973 to 1975.