He also served as Special Assistant in the Office of Prayer and Spiritual Awakening, Home Mission Board, Southern Bapist Convention. He has written numerous articles and several books on prayer and the life of E. M. Bounds.
Darrel and his wife of 46 years, Jan, lives in Atlanta, Georgia. They have two grown daughters, Sara and Beth, and son-in-law, Robert. Darrel is "Pa" to his grandson, James.