In 1946 he joined the University of Wisconsin–Madison, where he remained for most of his career following a program on determining fast neutron cross-sections, directing the doctoral dissertation research of over forty students. In 1970, his laboratory was destroyed by a terrorist attack on a military research facility there, which seriously injured one of his graduate students and killed a member of  another research group.
In 1946, he joined the University of Wisconsin–Madison and remained there for much of his career after completing work on determining fast neutron cross-sections. In 1970, a terrorist attack at a military facility destroyed his laboratory, injuring one of his graduate students and killing someone from another research group.