John is a free lance trombonist, pianist, and composer/arranger. He has performed with various jazz artists including Chris Potter, Erik Harland, the Mingus Dynasty Orchestra, and Terrence Blanchard as well as vocalists and popular artists including Barbara Streisand, Peter Gabriel, Tony Bennett, and Lady Gaga. He is the chair of the theory department at the California Jazz Conservatory in Berkeley, and he has been teaching online jazz improvisation skills classes since 2018.