Owner, Bob Knowler's Black Night, Sioux City, Iowa., 1967-1982; president, Curtis Media Corporation, Sioux City and Dallas, 1983-1994; treasurer, Woodbury County, Sioux City, since 1995.
Chm. board directors Morningside College, Sioux City, 1972-1984, Boys Club of Sioux City, 1975-1990. Vice chairman Sioux City Chamber of Commerce, 1975-1980. President Siouxland All-American Band, Sioux City, 1988-1997.
Member Rotary International (executive secretary since 1992, Paul Harris fellow 1990), Masons, Shriners.