Davis is one of the most powerful business people in the world, as a member or former member of the boards of Alliance Bank, Dow Chemical (1988-2006), Johnson Controls (1991-2006), K-Mart, L.A. Gear, Manpower (2001-), Metro-Goldwyn-Mayer (1999-), MGM Mirage, Rally's Inc., Sara Lee (1983-), Schlitz Brewing, and WICOR Inc. He has been president of All-Pro Broadcasting, operators of radio stations KCXX-FM, KATY-FM, WLDB-FM, WLUM-FM, and WMCS since 1976.