Rosnei Tuon began her studies in her native Brazil. He wins several competitions and plays as a soloist with the Municipal Symphony Orchestra of Rio de Janeiro, the Brazilian National Orchestra, the Symphony Orchestra of the State of São Paulo and the Symphony Orchestra of Saint Louis in Argentina.

In 1996, he was awarded a First Prize for virtuosity and the Lullin and Vidoudez Prizes at the Geneva Conservatory of Music in the class of Corrado Romano. He pursued postgraduate studies at the National Conservatory of Lyon with Pavel Vernikov. In Italy, he was awarded Second Prize at the Portogruaro Music Festival Competition and participated in numerous concerts.

In chamber music, he created the Astor Ensemble and the Da Cappo Trio, with whom he plays regularly in several countries. He collaborates with the National Orchestra of Lyon and the Orchestra of Bern. He was the principal conductor of the second violins at the Geneva Chamber Orchestra for 2 years, and joined the Orchestre de la Suisse Romande in 2000 as substitute soloist for the second violins.