Complex sentence: Hafen served as president of Ricks College in Rexburg, Idaho from 1978 to 1985 and from 1985 to 1989 he was the dean of the J. Reuben Clark Law School at BYU.
Split into simpler sentences: Hafen served as president of Ricks College in Rexburg, Idaho from 1978 to 1985. From 1985 to 1989 he served as the dean of the J. Reuben Clark Law School at BYU.