John was born May 26, 1948 at Fort Collins, Colorado. His parents are Harold and Orphea Mummert. He graduated from Colorado Theological Seminary in 1973. John served Church of the Brethren pastorates at Cushing, Oklahoma, Phoenix, Arizona, and Garden City, Kansas before coming to Pleasant View in 1983. John served Pleasant View until 1998. His children from a previous marriage are Peter, Sarah, and Anne. John is married to Regena Koontz and their children are Jeremy and Matthew. He has been a member of the Allen County Ministerial Association.