He also toured Europe with international musicians: Philly Joe Jones, Clifford Jordan, Pepper Adams, Slide Hampton, Tete Montoliu, Sal Nistico, Michel Petrucciani, Horace Parlan, Michael Urbaniak, Joe Henderson, etc. He started teaching at the Liège conservatory in 1980 and now teaches at the Royal Conservatory of Brussels. Jean-Louis Rassinfosse toured around the world as a member of many groups: Eric Legini trio, John Ruocco trio, Phil Abraham quartet, Richard Rousselet Quintet, Paolo Radoni trio, Steve Houben trio, Marcia Maria trio, trio L'ame des poetes, Fabrice Alleman Quartet and One shot band. In 1988 he started touring regularly with the Klaus Ignatzek international group in which Joe Henderson, Claudio Roditi, Gustavo Bergalli, Jay Ashby and singer Anca Parghe also played.
He is also known for his work in a trio with Philip Catherine and Chet Baker, which was released on Igloo Records. In 2001 Jean-Louis released a new CD as a band leader, named Crossworlds, in which he united two bands with which he frequently played: l'Ame des poètes and the international quartet of German pianist Klaus Ignatzek.