He lives in St. Louis , Missouri and still works in HOK 's St. Louis office .
In 1955 , he co-founded the global architectural firm HOK ( formerly Hellmuth , Obata + Kassabaum ) .
He lives in St. Louis , Missouri and still works in Hellmuth , Obata + Kassabaum 's St. Louis office .
In 1955 , he co-founded the global architectural firm HOK ( formerly Hellmuth , Obata + Kassabaum ) .