As a chamber musician, he has played with Belgian musicians including the clarinetist Walter Boeykens, the pianist Daniel Blumenthal, the violinist Guido Deneve, the violist Leo Deneve, the cellist Edmond Baeyens, the Spiegel Quartet, as well as with international partners such as the violinists Ning Kam and Alexander Kramarov, the violist Hartmut Lindemann, the cellist Marien van Staalen, and the Panocha Quartet.

Jozef De Beenhouwer's recordings include works by Johannes Brahms, Hans Pfitzner, Franz Schubert, and by the German romantic composer Ludwig Schuncke, whose G minor sonata he was the first to perform.

He managed to reconstruct and complete an unfinished Concertsatz in D minor dated 1839, drawing on Robert Schumann's autograph, whose pages, besides being hard to read, had also been wrongly bound.

On tour in the US, Jozef De Beenhouwer has played a number of concerts as a soloist and with the violinist Janet Packer, and their programs have all featured American composers, such as Irving Fine, Amy Beach, Gardner Read, Andrew Imbrie and Vittorio Rieti.

Until 2020, he continued as a guest professor, teaching, together with the mezzo-soprano Lucienne Van Deyck, the course of Art Songs, term of which was devoted to German Lieder.