1907 - Birth in Saint Louis Missouri
1929 - B.Arch. from Washington University in St. Louis
1930 - M. Arch. from the same
1932 - Begins practice as an architect in the employ of the City of Saint Louis
1949 - Establishes Hellmuth, Yamasaki and Leinweber
1954 - Establishes Hellmuth, Obata + Kassabaum, which becomes HOK Group, Inc.
1999 - Death