Harold is one of the founders of Soddo Christian Hospital and holds the title of President Emeritus of the Board. He and his wife Bonnie Jo served in Ethiopia with SIM from 1966 to 1976 and from 2000 to 2006 and in West Africa from 1988 to 1996. They have two children David and Carolyn, both of whom are working in east Africa as missionaries. Harold graduated from Wheaton College, and the University of Pennsylvania School of Medicine. He is a Fellow of the American College of Surgeons and the International College of Surgeons.

He is the author of two books and the recipient of many life time achievement awards.