Complex sentence: He was assistant professor of religion at Wabash College in Crawfordsville, Indiana, from 1954 to 1956, before becoming associate professor of Bible and religion at Emory University from 1956 to 1968.
Split into simpler sentences: He was assistant professor of religion at Wabash College in Crawfordsville, Indiana, from 1954 to 1956. He went on to become an associate professor of Bible and religion at Emory University from 1956 to 1968.