Amihai Grosz began his viola studies at the age of 12 under David Chen at the Jerusalem Academy of Music. Later, he became a student of Tabea Zimmermann at the Academy of Music Hanns Eisler in Berlin and of Haim Taub at Keshet Eilon Music Center. 

Amihai Grosz has performed as a soloist with various renowned orchestras in Israel and Germany, such as the Jerusalem Symphony Orchestra, the Israel Chamber Orchestra, the Münchner Kammerorchester and the Staatskapelle Berlin, which has given him the opportunity to work with artists such as Isaac Stern, Daniel Barenboim, Mitsuko Uchida, Yefim Bronfman and David Geringas.

Amihai Grosz is also a founding member of the Jerusalem String Quartet. In addition, the violist has performed as a chamber musician at prestigious festivals in Israel, the Netherlands and Switzerland. Amihai Grosz plays an instrument made by Gasparo da Salò from the 16th century which is on loan to him for life from a private collection.