Cynthia Burrill was born to missionary parents in Bolivia, South America. She met her husband Russell at Union College in Nebraska.
The By rritis have ministered in Southern New England, Mountain View, Chesapeake, Kansas-Nebraska and Upper Columbia Conferences. Cynthia assisted in Russell's pastorate and in full-time evangelism. She has also worked as a printer, secretary, and elementary school teacher.
In 1985 they moved to Chicago, Illinois, when Russell became the director of the North American Division Evangelism Institute. Cynthia became Coordinator of Women's Ministries, taught a Pastor's Spouse Class and Seminar Evangelism. The institute recently moved to Michigan where she continues her work.