His viola teachers were David Chen in Jerusalem, Tabea Zimmermann in Frankfurt and Berlin, and, in Tel Aviv, Haim Taub, who had a formative influence on him.
Their recording of two Haydn string quartets received a Diapason d'Or de l'Année 2009 and won the 2010 BBC Music Magazine Chamber Award.
[5] In 2004, Grosz performed the world premiere of Omer Meir Wellber’s Viola Concerto.
[6] In 2012, he played Luciano Berio’s "Sequenza VI" for viola solo at the Philharmonie Berlin.
Grosz plays a 1570 Gasparo da Salò viola on loan for life from a private collection.