Recognised for his nuanced orchestral colours and rhythmic precision, Iselin’s repertoire strengths range from the French and Nordic repertoire through to late Romantic and contemporary, with a particular affinity for the works of Debussy, Ravel, Sibelius, Prokofiev and Stravinsky.

He is also developing a growing presence in the field of opera. A regular guest at Opera Hedeland, Denmark’s largest outdoor opera venue, he has conducted Le nozze di Figaro, La Cenerentola, Carmen and Rigoletto. In 2025, he conducted performances of Die Zauberflöte at Stockholm’s Folkoperan. He was also second conductor and assistant on productions including Smetana’s The Bartered Bride at Stadttheater Bern and Zimmermann’s Die Soldaten at Oper Köln, Elbphilharmonie Hamburg and Philharmonie de Paris. 

Iselin studied orchestral conducting at the Sibelius Academy in Helsinki, the Conservatoire National Supérieur de Musique de Paris, Zürich University of the Arts and the Royal Danish Academy of Music and has been a Conducting Fellow at the Verbier Festival. He has worked as assistant conductor to Michael Tilson Thomas, Sir Antonio Pappano, Susanna Mälkki and Vasily Petrenko. He counts among his mentors Mariss Jansons, Fabio Luisi and Sakari Oramo.

Alongside his conducting studies, Iselin completed degrees in percussion and harmony at Conservatoire de Paris. As a percussionist, he has performed under conductors including David Zinman, Dennis Russell Davies and Matthias Pintscher.