Wim Bex was born in Sint-Truiden in 1977 and began his instrumental studies with Mr. Marcel Vandereycken at the Tongeren music school, first on trumpet and four years later on tenor trombone. He continued his studies at the Hasselt music high school and then went to the Lemmens Institute in Leuven, where, under the impetus of his teacher Mr Michel Tilkin, he switched to bass trombone.

After a dozen years of freelance playing with just about all Belgian and some foreign orchestras, he was permanently employed as bass trombonist with the Limburg Symphony Orchestra in Maastricht since 2009. Since the merger with the Brabant Orchestra in 2013, the orchestra is now called "philharmonie zuidnederland".

In 2008, he wrote his first composition Vademecum for Bass Trombone, at the request of and recorded by Geert De Vos.
Due to the many positive reactions to this work, composing soon gained momentum and solo works for tenor trombone, trumpet and bass tuba followed, among others, all already recorded on CD.

The most important teachers in his musical career are Ludo Verjans, Michel Tilkin and Wim Henderickx. In addition to a natural and logical view of a musical score, they taught him above all that music should be approached with an open and positive mind, entirely at the service of 'the story behind the notes'.

List of available scores