John-Henry graduated with a Bachelor of Music from Trinity Conservatoire of Music and Dance.

He is busy as a bass player in various different groups, freelancing with various London-based orchestras as well as playing in various smaller jazz and pop groups.

He has a particular interest in Opera, and recently premiered Errollyn Wallen's Yes! at the ROH2 (the contemporary arm of the Royal Opera House), in which he featured on double bass, electric bass and electric guitar.