Mr. Bush has held the position of Principal Clarinet with the Glens Falls Symphony Orchestra for more than 20 years. Previously Principal Clarinet with the Brooklyn Chamber Orchestra and Boston Civic Symphony, Christopher has also performed with the Boston Philharmonic, Albany Symphony, New York String Orchestra, Indian Hill Symphony, Cape Cod Symphony, Nashua Symphony, Granite State Opera, Granite State Symphony, New England Philharmonic, Westchester Chamber Symphony, DiCapo Opera, Seoul Philharmonic, West Point Band, Camerata New York, New York Concert Artists Orchestra, New Bedford Symphony, Harlem Chamber Players, Quintet of the Americas, and the North Country Chamber Players. Christopher has also performed as a soloist with the Glens Falls Symphony, Slobozhansky Orchestra (Ukraine),  Metro Chamber Orchestra, New England Conservatory Symphony, Society of Musical Arts Orchestra, Callithumpian Consort, and the New York University Symphony Orchestra. He was also clarinetist and co-founder of Summerland Music Society, a chamber music series in upstate New York. Mr. Bush has performed at venues and festivals throughout the world, including Les Flaneries Musicales d’Ete in Reims, France, Open Air Klassik Hoppegarten in Berlin, London New Winds Festival (UK), Asian Composers League in Seoul, Ithaca New Music Collective, New School Concert Series, Harvard Group For New Music, Boston’s New Gallery Concert Series, NEC’s Keller Jazz Series, the Boston New Arts Initiative, the Isabella Stewart Gardner Museum’s Young Artists Showcase, and New London’s Summer Music Series in New Hampshire. In Boston’s Jordan Hall, he has taken part in the Composer’s Series, Enchanted Circle Series, Tuesday New Music Series, and annual Festival Weeks. Additionally, Christopher has performed in New York’s Galapagos Art Space, The Tank, Spectrum, Alice Tully Hall, and Carnegie Hall. Mr. Bush has worked with composers Gunther Schuller, Steve Reich, Frederic Rzewski, Lee Hyla, Alvin Lucier, Michael Finnissy, Joan Tower, Pozzi Escot, Lowell Liebermann, Paul Elwood, Walter Zimmermann, John Heiss, Tamar Diesendruck, and Malcolm Peyton on performances of their own music. With the Glens Falls Symphony, Christopher commissioned and premiered Michael Gandolfi’s Anthem for solo clarinet and string orchestra. He also commissioned works from composers  Emiliano Pardo Tristan, Yumi Hara Cawkwell, Curtis Hughes, Izzi Ramkissoon, Pozzi Escot, and Lawrence Dillon. Lawrence Moss's Shadowplay  and Israeli composer Guy Barash’s Talkback for Clarinet and Electronics were also written for Mr. Bush. Christopher’s performances have been broadcast on WGBH (Boston) and KBS (Korea) radio stations. On television, Christopher has performed on the PBS special A Taste of Chanukah and Korea’s MBC, SBS, KBS, and Arirang networks. A featured soloist on the soundtrack to the Huntington Theatre’s production of Dead End, Christopher has also recorded for Naxos, Albany, Innova, and Mode record companies.