Together with Vincent Warnier, he was appointed organist of Saint-Étienne-du-Mont church in Paris in 1996 (succeeding Maurice Duruflé).
His passion for the cinema has led him to improvise on the piano and the organ; he composed music for Frank Borzage's silent film Seventh Heaven, commissioned by the Louvre in 1999.
He has written more than a hundred works, awarded with the Prix des Lycéens (2002), the Grand Prix de la Musique symphonique from the SACEM in 2004, and on three occasions, in 2003, 2006 and 2011, the French Victoires de la Musique Composer of the Year award.
Although he composes for the organ (solo pieces, chamber music, two concertos, La Barque solaire [The Sun Boat] for organ and orchestra), Escaich is open to all genres, forms and instruments (piano, saxophone[1]...).
His music is performed by orchestras such as the Philadelphia Orchestra, the Berlin Konzerthaus Orchestra, the Mariinsky Theatre Orchestra or the Orchestre de Paris, by choirs such as Radio France Choir, the BBC Singers, Sequenza 9.3 [fr] and by musicians such as Christoph Eschenbach, Lothar Zagrosek, Jun Märkl, Claire-Marie Le Guay, Paul Meyer, Gautier and Renaud Capuçon, Olivier Latry, Iveta Apkalna, David Grimal, Nora Gubisch, John Mark Ainsley, the Trio Dali, the Trio Wanderer and the Quatuor Voce.