The main jazz ensemble of the Reunion Music Society is the RMS Jazz Orchestra which encompasses several groups, including a big band and big band with strings. The jazz ensemble has collaborated with the strings sections of the Orchestra to present a Jazz with Strings program on several occasions.

The RMS Jazz Orchestra has been delighting audiences with innovative jazz concerts for over twenty years. Performing in both large and small ensemble formats, the group has presented such unique programs as “The Evolution of the Blues,” “Jazz with Strings,” and “An Evening of the Music of Nelson Riddle.”

The Reunion Big Band, which was started in 1977, celebrated its 40th year in October 2017 at the RMS 25th anniversary celebration.