John Thiessen appears as soloist and principal trumpet with early music ensembles in the United States and Canada, including Tafelmusik, Philharmonia Baroque Orchestra, American Bach Soloists, Boston Early Music Festival, and Boston Baroque.
Thiessen is a graduate of the Eastman School of Music and King’s College, University of London, and is the recipient of grants from the Canada Council and Ontario Arts Council for studies in the United Kingdom. He had presented master classes at Juilliard and University of Texas, and he has taught at the baroque institutes at Oberlin College and the Longy School. He is an adjunct faculty member for Carnegie Hall’s Academy program
Thiessen has recorded extensively for Sony Classical Vivarte, Telarc, EMI, BMG, Deutsche Harmonia Mundi, London Decca, Analekta, CBC and Denon, and is heard in the film Casanova.