The Concordia Sinfonietta will present a concert featuring an early Mozart symphony, Mahler’s Blumine, a brass symphony by Kaetsier, and the beloved Finlandia by Sibelius. The program will also include a true tour-de-force, Rimsky-Korsakov’s Trombone Concerto, played by recent Colburn School graduate Steven Warren and accompanied by the Concordia Wind Orchestra.