Niilo Tarnanen is a Finnish composer of contemporary art music. In recent years, he has explored opportunities of performance-specific form. Since April 2021, he is the vice-chairperson of the Society of Finnish Composers, and as of May 2021, a board member of the Finnish Music Council. June 2015 to July 2018, he was the chairperson of the young composers’ association Korvat Auki (Ears Open).
He also teaches Music Theory at the Sibelius Academy of the University of the Arts Helsinki.