Wach taught at the University of Chicago Divinity School from 1945 to 1955, becoming the chair of the History of Religions area, which had just been moved to the Divinity School from its earlier home in the Division of the Humanities.
A predat la University of Chicago Divinity School în perioada 1945-1955, devenind șeful catedrei de istoria religiilor, care tocmai fusese transferată la Divinity School de la Division of the Humanities.