Born in Strasbourg in 1992, Etienne Haan has completed his Composition studies at the Conservatory of his hometown, where he studied with Annette Schlünz, Thierry Blondeau, Philippe Manoury, Tom Mays and Daniel d’Adamo. After successfully completing his Bachelor exam in Strasbourg, Etienne Haan entered the Hanns Eisler Hochschule für Musik in Berlin for a Master's degree in Composition, where he studied with Hanspeter Kyburz (2017-19). He is "artist diploma" in the Barenboim-Said Academy in Berlin in the class of Jörg Widmann in 2024/25.

Simultaneously to his composition studies, he studied Conducting, first with with M. Etchegoncelay (Strasbourg) and then with M. Fabricius (Berlin). He finished his Master's degree in Conducting at the Centro Superior Katarina Gurska in Madrid (2022-23), supervised by Borja Quintas. Haan is specialising in contemporary music conducting, and attended multiple workshops with Jean-Philippe Würtz, William Blank, Titus Engel, and more recently with Peter Rundel.

In 2019-20 he was artist in residence at the Casa de Velázquez, and in 2022 he won the prize for contemporary-music composition of the city of Oldenburg (Germany).  His works have been performed by professional ensembles such as Hanatsu Miroir (Strasbourg), Télémaque (Marseille), Zafraan (Berlin), Oh ton! (Oldenburg), the trio Brouwer (Barcelona), the Orchestre Philharmonique de Strasbourg, and the Tonkünstler Orchester (Grafenegg, Austria).

The composer’s skills include instrumental and electronic composition, and also transdisciplinary collaborations with other artists. Among them, with the Slovak choreographer Alica Minar, the Spanish painter Keke Vilabelda, French film directors Marine de Contes and Mariette Feltin, the German architect Hans Walter Müller, and the French theatre company "Des Chateaux en l'air".

His aesthetic research is based on perception, using causal effects and other tools to draw the public’s expectation and play with it. The wish of the composer is to create  music that anyone can relate to, without needing any musical education but only curiosity