Dan was born in Kansas City, Missouri and grew up in Richardson, Texas. He was raised in a Christian home and came to faith in Christ as a young boy. Mr. Duncan graduated from Texas Christian University in 1971 and Dallas Theological Seminary in 1976. He has attended Believers Chapel since 1967 and has been involved in the ministry at the Chapel since 1974. Aside from pastoral ministry, Mr. Duncan is the primary teacher for the Ministry of the Word service on Sunday mornings.