 From 1931 to 1937 Feigl taught as a lecturer and assistant professor at the University of Iowa. In 1937, he was granted US citizenship. From 1938 to 1940 he served as an associate professor at the University of Iowa. Eventually, in 1940, Feigl received a full professorship at the University of Minnesota in Minneapolis. There he founded in 1953 the Minnesota Center for the Philosophy of Science which was the first center of that kind in the United States and which is still one of the leading institutions for research in the history and philosophy of science (further details in Neuber 2018a).