[1][2] As a soloist, Weiss worked with many European orchestras[3] and ensembles of contemporary music.
As a chamber musician, Weiss is primarily working with his two ensembles, Trio Accanto (Nicolas Hodges, piano and Christian Dierstein percussion)[6] and Quatuor Xasax in Paris (with saxophonists Serge Bertocchi, Jean-Michel Goury and Pierre-Stéphane Meugé.
[10] He is regularly giving masterclasses at various international universities (London, Madrid, Berlin, Vienna, Moscow, Amsterdam, Bordeaux, Palma, Porto, Boston, New York, Chicago,[11] Takefu, Sevilla.).
Weiss is a regular teacher at the "Darmstaedter Ferienkurse fuer neue Musik“[12][13] as well as at IMPULS (ensemble academy) in Graz, Austria.
[14] He studied saxophone with Iwan Roth at the Hochschule für Musik Basel and Frederick L. Hemke at Northwestern University in Evanston, Illinois.