Tom Mostert is president of the Pacific Union Conference where he has served since 1986. He is also on the board of directors of Adventist Health, La Sierra University, and Pacific Union College. He has a bachelor's in theology from Southern Missionary College and a master's of divinity from Andrews University.

Tom began his ministerial service in the Arkansas-Louisiana Conference in 1964. He was a pastor in the Chesapeake Conference and ministerial secretary of the Potomac Conference, after which he served as president of Mountain View, Hawaiian, and Southeastern California conferences.

He is married to Pauline and they have three grown daughters.