Don Sebesky (b. 1937) is a music arranger who composed the rhythmic percussion-only score for Time Piece. Beginning his career as a trombone player while studying at the Manhattan School of Music, Sebesky played stints with the Tommy Dorsey Band and Stan Kenton before giving up the instrument in 1960 in favor of arranging and conducting. This led to Time Piece and to work on Wes Montgomery's 1965 album Bumpin'.
Sebesky later became house arranger for many of producer Creed Taylor's labels. He's supplied orchestrations for several Broadway musical revivals, including the 2005 run of Sweet Charity.