Rev. Evans-Tiller was ordained by the Birmingham Unitarian Church of Bloomfield Hills, MI as its Minister of Religious Education on May 31, 1987. But her career as a religious educator began long before then. She served as the Director of Religious Education for the First Unitarian Church of Rochester, NY from 1966 to 1973. Rev. Evans-Tiller then served as the Director of Religious Education for the First Unitarian Universalist Society of Syracuse, NY from 1978 to 1982, at which time she entered ministerial fellowship with the Unitarian Universalist Association. After moving to Michigan, she served the Birmingham Unitarian Church from 1987 to 1989. Later Rev. Evans-Tiller served the First Unitarian Universalist Church of Detroit as its acting Director of Religious Education until 1996, when she retired from the ministry.