Thomas Usteri graduated in viola at the Conservatory of Zurich. He attended the master courses of Bruno Giuranna in Detmold, Siena and Cornwall. He worked for a long time with the Thonalle Orchestra and with the Chamber Orchestra of Zurich. In the ‘80es he attended his lessons at the Dimitri School of Theatre. He played in many comic shows as actor-musician in Byland and Turba's La traversée du dessert and making his debut in Paris, Reims and Berlin in a clown part in L'homme orchestre with the clown Dimitri. From 1988 he's member of the Orchestra of  Winterthur. On 1987 he starts working with Lorenzo Manetti.