From 1977 to 1981, he attended the Swiss jazz school in Bern and graduated with a master's degree.
The group expanded to a quartet with the addition of Hans Koch and guitarist Giancarlo Nicolai.
In 1994, the Peter Schärli Special sextet was formed with Ferris, Tom Varner, Dürst, Hans Feigenwinter, and Béatrice Graf.
[1] Schärli has worked with Johannes Bauer, Christy Doran, Rick Margitza, Co Streiff,[1] Gerry Hemingway, Paul Rutherford, Werner Lüdi, and Dom Um Romão.
In the jazz poll of the Brazilian daily newspaper Tribuna da Imprensa Schärli was chosen trumpeter of the year 2006.