The Seattle Repertory Jazz Orchestra (SRJO) is a 17-piece big band founded in 1995 as the Northwest's first permanent ensemble dedicated to the accurate and historically observant performance of the great works of Jazz music. The SRJO is co-directed by drummer Clarence Acox, director of the highly successful band programs at Seattle's Garfield High School, and saxophonist/arranger Michael Brockman, long-time faculty member at the University of Washington School of Music.

The SRJO's extensive and growing repertoire is drawn from the 100-year history of Jazz, from turn-of-the-20th-century ragtime to turn-of-the-21st-century avant-garde, including works by by America's many famous Jazz composers, among them: Count Basie, Duke Ellington, Gil Evans, Fletcher Henderson, Charles Mingus, Thelonious Monk, Dizzy Gillespie, Jimmie Lunceford, Miles Davis, Benny Moten, Gerry Mulligan, Thad Jones, Jelly Roll Morton, and George Russell.