Wennberg was named teacher of the year at Westmont a record five times (1973, 1982, 1989, 1995 and 2002) and received the faculty research award in 1986. He taught philosophy at Westmont for 37 years and authored several books, including "Faith at the Edge: A Book for Doubters" and "God, Humans and Animals: An Invitation to Enlarge Our Moral Universe".