 Hattner participated in the American Academy of Conducting at the Aspen Music Festival three times ( 2003 , 2005 and 2006 ) ; there he studied with Murry <unk> and David Zinman , the former conductor of the Baltimore Symphony Orchestra . In February 2006 he conducted Richard Einhorn 's Voices of Light as the score to Carl Theodor Dreyer 's 1928 silent film The Passion of Joan of Arc at the Winter Garden Atrium in Manhattan as part of the World Financial Center 's Arts + Events series . Hattner has also guest conducted the Brooklyn Symphony Orchestra , Cincinnati Chamber Orchestra , Ensemble <unk> , Eugene Symphony , International Contemporary Ensemble , and the Massapequa Philharmonic Orchestra . He has been the principal clarinet with the Cascade Music Festival Orchestra in Bend for two seasons , the Key West Symphony Orchestra , and the New Jersey Opera Theater . In 2010 he became a member of Interlochen 's Heritage Society , reserved for people who have chosen to contribute to Interlochen through estate @-@ planning . In May 2010 he served as conductor of the Interlochen Philharmonic during the first two weeks of Interlochen Arts Camp . Hattner made his Oregon Symphony debut in January 2011 . He guest conducted the Oregon Mozart Players , an ensemble based in Eugene , in October 2011 as one of three finalists to fill the position of departing music director Glen Cortese . Hattner guest conducted the Oregon State University Wind Ensemble and <unk> in October 2011 , followed by the University of Oregon Symphony in November 2011 . In April 2012 Hattner conducted and performed clarinet for Promise , an opera by Theresa Koon about the life of Camille Claudel . 
