Warren and his wife Carol were married in 1979. Warren ministered in a couple of churches in Nebraska and Colorado before he and Carol joined United Indian Mission, with which they have been serving since 1985. During these years of service, Warren and Carol have been able to minister in the United States and Canada.
Along with teaching, Warren also directs the students' christian ministry assignments with Bill Bagley. Warren continues to serve with UIM as the international representative and as a board member.