Chicago Symphony Announces New Commission by Jim Stephenson January 30, 2018January 9, 2018 by Sally Stephenson Very excited to officially announce that I will be writing a new bass trombone concerto for Charlie Vernon, to be premiered by the Chicago Symphony Orchestra, under the direction of Maestro Riccardo Muti. June 13-15, 2019. https://cso.org/ticketsandevents/production-details-2018-19/chicago-symphony-orchestra/muti-conducts-american-paris-tchaikovsky/?perfNo=9314