[1] Dieltiens continued his studies at the Chapelle musicale Reine Élisabeth in Waterloo, Belgium.
[1][2] Dieltiens played with the violinist André Gertler, the clarinetist Walter Boeykens and the countertenor and conductor René Jacobs.
Several contemporary composers, including Luc Van Hove and William Bolcom, have asked Dieltiens to give first performances of their works.
Iets op Bach, which translates loosely as "A Little Something set to Bach",[4][5] won a Time Out Live Award in London, England in 1998[1] and a Masque d'Or de la Production Etrangère[6] (Golden Mask for a Foreign Production) award in 1999.
[2] Recordings include: Dieltiens teaches at the Musikhochschule Hochschule für Musik und Theater in Zürich, Switzerland.