Thomy was born 1963 in Zurich. He studied double bass at the Swiss Jazz School and electric bass at the MIT Hollywood with Jeff Berlin. He was part of the swiss punkjazz-movement in the early 80's and toured Europe with freefunk-bands like Donkey Kongs Multiscream and The Intergalactic Maidenballet.
In 1988 Thomy moved to Berlin, where he had the chance to perform and record with local and international Worldmusic artists. He also got involved with the german pop-scene. Thomy played the bass for Rosenstolz on most of their albums and toured with them from 2002 to 2009. He was also a member of genius comedian-musician Helge Schneider's Rock project The Firefuckers.
Zurich-based songwriter Adrian Weyermann invited Thomy to join his band in 2006. Nik Baertsch met Thomy in 2004 in Tokyo, Japan, where he studied Japanese. Back in his hometown, Thomy started to frequently sit in with Nik Baertsch's RONIN on Mondays. In sommer 2011 bassist RONIN's original bass player Björn Meyer left the band on friendly terms and Thomy replaced him.
Except being a member of RONIN, he is working with Adrian Stern and teaching at the conservatories in Luzern and Basel.