Edgar Harrell, USMC (Ret.), owned and operated a distributorship for the Pella Window Company in Rock Island, Illinois, for thirty-five years, served for fifteen years on the board of Moody Bible Institute, and has been a lay minister throughout his adult life. He lives in Clarksville, Tennessee, with his wife, Ola.
David Harrell is currently the senior pastor-teacher of Calvary Bible Church, where he has served since 1997. His Bible expositions are heard and read regularly around the world over the Internet and broadcasted over the radio. He is also the president of Olive Tree Christian Resources.