For three years (1973-76) he was associate professor of religion and philosophy and a campus minister at Goshen College, which in 2010 honored him and his wife, Wilma, with its Culture for Service Award, given in tribute for lives spent in respectful and culturally appropriate mission work through the Mennonite Mission Network
. He is author of a three-volume doctoral study of the Liberian Christian prophet William Wade Harris, abridged and published as The Prophet Harris: "Black Elijah" of West Africa (1994).
Green, Mennonite Mission Network
, blends classroom instruction and one-on-one sessions to offer a time of personal renewal, counsel, and direction for Christian workers.