[2][6] The same year, he also became conductor and artistic director of the Swiss Youth Symphony Orchestra (SJSO),[2][7] a position he held until his death.
[9] In April 2022 they were part of Through the Night's episode "Europe's Young Performers", a BBC Radio 3 program.
[10] Bumann was musical director of the Warsaw Chamber Opera from 2003 to 2013,[2] beginning with Verdi's Falstaff.
[11][12] Bumann was chief conductor of the two orchestras of the Bromberg Philharmonie from 2015,[2][4][13] and also became professor of conducting at the Stanisław Moniuszko Academy of Music in Gdańsk [de] in 2010.
[14] Bumann was a friend of many personalities in Polish cultural life, and conducted the world premiere of Krzysztof Penderecki's Lacrimosa No.