Through hard work and determination, Beta Sigma Psi survived World War II, and in 1949, Epsilon chapter was established at Iowa State University. Expansion continued over the next few years as Zeta chapter was organized at Kansas State University in 1951, and Eta chapter followed at the University of Missouri–Rolla in 1952. That year at the National Council meeting in Ames, Iowa, the fraternity found another leader who would work with Del for many years. John Hingst, an alumnus of Beta chapter, was elected National President and went on to serve for 14 years in that position. Then in 1955, Alpha chapter was reactivated, and in 1962 Iota chapter was chartered at the University of Missouri – Columbia.