Rosnei Tuon began his studies in Brazil. 
He won several competitions there and played regularly as a soloist with the Brazilian National Orchestra, the Rio de Janeiro Municipal Orchestra, the Sao Paulo State Symphony Orchestra, the San Luiz Symphony Orchestra in Argentina, among others.

He obtained a 1st Prize in Virtuosity with distinction at the CSM in Geneva in the class of C. Romano, as well as the Vidoudez and Lullin prizes. In Lyon, he continued his postgraduate studies with Pavel Vernikov. In Italy, he received the 2nd prize at the Portogruaro Festival.

He has already played as a soloist with the Orchestre de la Suisse Romande, the CNSM of Lyon, the Sinfonietta of Geneva and the Ensemble Instrumental Romand.

A regular guest teacher and chamber music performer at the Campos do Jordão Festival (Brazil), Rosnei Tuon has already collaborated with the Orchestre National de Lyon, the Bern and Lucerne Symphony Orchestras.

For two years he was the second violin leader of the Geneva Chamber Orchestra and in 2000 he joined the Orchestre de la Suisse Romande as substitute soloist for the second violins.