Canadian jazz trombonist, composer, and bandleader Rob McConnell (1935–2010) was a towering figure in big band jazz from the 1960s onward. He founded and led The Boss Brass, a highly acclaimed 22-piece ensemble renowned for its precision, intricate arrangements, and sophisticated sound. McConnell's innovative compositions and arrangements earned him multiple Grammy Awards and solidified his legacy as a master of modern big band music.