Rob McConnell (1935–2010) was a Canadian trombonist, composer, and arranger. He is best known for founding and leading the Grammy Award-winning big band The Boss Brass from 1967 to 1999.

Rob McConnell's big band music is firmly rooted in the jazz tradition, but offers clever interpretations of well-known jazz standards, challenging ensemble passages (for the musicians) and exciting ones (for the audience), as well as plenty of space for the orchestra's soloists. Other hallmarks of Rob McConnell's music are the expanded instrumentation (eleven brass instruments, including two French horns) and the subtle humor that runs through all his compositions.

Ed Partyka met Rob in 1989, and the two remained in contact until Rob McConnell's death. Partyka recalls: “He was an incredibly warm and funny person, which you can also hear in his compositions. In my opinion, he was also an underrated soloist on the valve trombone, surpassed in expression and virtuosity only by Bob Brookmeyer.”