Pastor Mark Byers was born in Pennsylvania and raised in Detroit, Michigan. Born again at an early age he attended the Nazarene church. The call of God for ministry came in his teens as he began attending an Assembly of God church where he was involved in early ministry for seven years. He attended Elim Bible Institute and graduated in 1970. He has served as a pastor for 34 years. Seven as an assistant pastor, and 27 as senior pastor – first in Depauville, New York, and for the last 21 years with his present congregation at Calvary Christian Church in Royal Oak, Michigan.
Pastor Mark Byers has been married to his wife Sharon for 35 years and has five adult children whom are all actively involved in Calvary Christian Church's ministries. Their oldest son, David, is one of the assistant pastors as well as the Minister of Worship at Calvary Christian Church. Along with their five children they have 13 grandchildren.