Soloist and chamber musician, Walter Grimmer is both comfortable with contemporary and classical pieces.

He has recorded Mozart and Schubert duo and trio, Brahms sonatas complete works. Walter Grimmer created and recorded, in particular, string quartets and solo works by Brian Ferneyhough, Helmut Lachenmann, Heinz Holliger, Isang Yun, Klaus Huber, Hans-Ulrich Lehmann, Pascal Dusapin, many of which were dedicated to him.

From 1965 until 1985, he teached at Bern Hochschule für Musik ; from 1985 until 2002, he teached at Zürich Hochs- chule für Musik, where he led a chamber music class. Walter Grimmer is often invited to give masterclasses around the world (Europe, China, Japan, Cairo…)