Borg taught at Concordia College in Moorhead, Minnesota, from 1966 to 1969 and 1972 to 1974; South Dakota State University in Brookings from 1975 to 1976; and Carleton College in Northfield, Minnesota, from 1976 to 1979. He was a faculty member at Oregon State University from 1979 until his retirement in 2007 as Distinguished Professor in Religion and Culture and the Hundere Endowed Chair in Religious Studies. Borg was appointed Chair of the Religious Studies Department in January 1988. The Religious Studies Department was closed at the end of the 1991–1992 academic year and Borg became a faculty member in the Philosophy Department. During his time at Oregon State he organized and led two nationally televised symposia, one in 1996 (Jesus at 2000), and another in 2000 (God at 2000). Borg also served as Visiting Professor of New Testament at the Pacific School of Religion, Berkeley (1989–1991) and the Chism Distinguished Visiting Professor at the University of Puget Sound, Tacoma, Washington (1986–1987).