Education: B.Arch., Washington University, Saint Louis, MO, 1947; work: Draftsman, Joseph D. Murphy, Saint Louis, MO, 1947-1949; Designer, Hellmuth, Yamasaki, and Leinweber, 1949-1955; Principal, Hellmuth, Obata, and Kassabaum, 1955-?; joined the American Institute of Architects, 1957; Kassabaum was very active in the American Institute of Architects; he was Vice-President of the Saint Louis Chapter, 1961; President of the Saint Louis Chapter, 1964-1965; Member and Chairman, AIA Housing for the Elderly Committee, 1961-1963; Vice-President of the National AIA, 1966-1968; President of the National AIA, 1968-1969;

Fellow, American Institute of Architects, 1967;

• Atchison, KS (Architect's Birth)
  Atchison, KS

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