David B. Marsh is married to the former Debra Jo Pierce. They are the parents of five children and the grandparents to eight grandchildren. David earned a bachelor of science from Brigham Young University in developmental psychology, a master of education in counseling from the College of Idaho, and a PhD in family studies and the sociology of religion, with a minor in the doctrinal teachings of Joseph Smith from Brigham Young University. David was employed with the Church Educational System (CES) for twenty-two years where he worked as a seminary and institute teacher, a seminary principal, a teacher support consultant, a curriculum writer, a CES coordinator, and an institute director. He left CES in May 2003 to manage the development of curriculum of the Church.
Currently, David works in the Priesthood and Family department where he develops materials relating to LDS doctrine and history.
David enjoys having in-depth discussions with his wife and spending time with his wife, children, and grandchildren. Throughout his life, he has enjoyed riding motorcycles, snow and water skiing, hiking in the mountains, and body surfing in the Pacific Ocean. He also enjoys reading biographies, nineteenth-century history, and Biblical history.