Jean-Pierre Dassonville is professor of horn at the Conservatoire Royal de Mons and of natural horn at the Conservatoire Royal de Bruxelles. In addition he gives master classes at Anjou and at the festivals of Epsilon à St-Yrieix-la-Perche and Avignon.

Since 1997 he has filled the position of solo first horn of the orchestra of the Théâtre de la Monnaie after having been a member of the Harmonie des Guides and the Orchestre symphonique de la RTBF. He was soloist in the horn concerto by Roland Schoelink at the festival of Vire en Normandie with the Orchestre de la Monnaie under the baton of Kazushi Ono. Amongst the many ensembles with whom he is regularly invited to perform are the Danel quartet, Oxalys and Nouvelles Consonances.

In addition he performs on natural horn with the wind quintet of Les Agrémens and the ensemble Solstice.