He also presides the Académie Maurice Ravel of Saint-Jean-de-Luz and is music director of the Soirées musicales of Arles.
With Marie-Josèphe Jude, he plays the repertoire with four hands or two pianos, interprets Bartók's two sonatas with violinist Péter Csaba.
Heisser also enjoys conducting the orchestra from his piano, as he did with the Orchestre national de France in a concerto by Mozart.
He has also played with the Moscow and Bucharest Philharmonies, the Orchestre de la Suisse Romande, the Dutch Chamber Orchestra, the RAI orchestras of Turin, Radio Sofia and Helsinki, the new Orchestre philharmonique de Radio France, the Bavarian Radio Symphony Orchestra, the Orchestre du Mai florentin, conducted, among others, by Zubin Mehta, Emmanuel Krivine, Marek Janowski, Myung-Whun Chung, Leif Segerstam, Michael Tilson-Thomas etc.
1973: 1st Prize in piano, counterpoint, harmony, fugue, accompaniment and chamber music For several years, he has specialized in the Spanish repertoire and has recorded works for piano by de Falla, Albéniz, Granados, Mompou and Turina (Erato, 1996).