Education: Sedletzky was trained in Austria; Designer, Victor Gruen Associates, Los Angeles, CA, c. 1955; Principal, Marcel Sedletzky, Architect, Carmel, CA, c. 1958-1995; Sedletzky's papers at the Sedletzky Archive, University of California, Santa Cruz;

Sedletzky moved to the United States in 1949 from Austria; by the mid-1950s, he had found work as a designer with the Austrian emigre, Victor Gruen in Los Angeles, CA;