Born in Bilbao, Mikel Urquiza studied composition at Musikene (San Sebastian) with Gabriel Erkoreka and Ramon Lazkano, then at the Paris Conservatory with Gérard Pesson. In 2019, he was sponsored by the Peter Eötvös Contemporary Music Foundation and was a resident of the Académie de France in Rome for a year (2019-2020).
He has worked with Trio Catch, Quatuor Diotima, C Barré, L'Instant Donné, the Ensemble intercontemporain, mdi ensemble, ensemble mosaik, and Musikfabrik, among others. His music has been performed at the Festival Présences, MATA New York, the Gaudeamus Muziekweek, the ECLAT Festival, and the Wittener Tage für neue Kammermusik.
Urquiza has written several series for voice such as Alfabet, for Sarah Maria Sun, I nalt be clode on the frolt, for Marion Tassou, or Songs of Spam for the Neue Vocalsolisten.