Tijs Klaassen (1993) picked up the double bass at the age of 19 during his second year at the Conservatory of Amsterdam. Switching from bass guitar to completely focus on the instrument he loves the most. He studied at the faculty with jazz teachers Ernst Glerum, Frans van der Hoeven, Ruud Ouwehand and classical teacher Peter Leerdam. In the last four months of 2017 he studied with David Wong at the Boyer College of Music and Dance in Philadelphia. During his stay in the United States he took private lessons with Ron Carter, Orlando Le Fleming, Rick Rosato and Ben Street. He finished his master studies in 2018 magna cum laude.

Conservatory of Amsterdam Jazz Bachelor (2011 – 2016)
Conservatory of Amsterdam Jazz Master (2016 – 2018)
Boyer College of Music and Dance (2017-2018 exchange semester)


Tijs Klaassen kwintet
Clavius (2019)

Floris Kappeyne trio
Interchange (2017)
Synesthesia (2019)

Mo van der Does kwartet 
Common Myths (2019)

Lucas Dann trio
Serious Music (2019)

Josse van der Schaft trio
Hollow (2018)

Gidon Nunes Vaz kwintet/sextet
Tribute to KD (2015)
City Lights (2015)
Carry It On! (2017)

Tijs Klaassen kwintet – Keep an Eye the Records (2018)
Mo van der Does kwartet – Expression of Art award (2018)
Ian Cleaver trio – Prinses Christina Concours (2016)
Oosterdok 4 – Prinses Christina Concours (2012)

Playing with these groups, and as a sideman with others, led him to play at festivals and venues like: het Bimhuis, North Sea Jazz Festival, Muziekgebouw aan het Ij, het Concertgebouw, Goois jazz festival and jazzclub Mampf.

He has worked professionally with musicians such as: Jasper Blom, Peter Beets, Martijn van Iterson, Henk Meutgeert, Yuri Honing and Theo Loevendie.