He was born in San Sebastián. In 2005, thanks to a scholarship from the provincial council of Gipuzkoa, he started training at the Mariemma Real Conservatorio Profesional de Danza in Madrid.
He took part in the Europa Danse project (2006 and 2007), where he danced choreographies by Nacho Duato, Jiri Kylian, Thierry Malandain, Léonide Massine and Balanchine. In 2007 he danced in the debut of the El Día de la Creación (The Day of Creation) choreography and also danced Alrededor No Hay Nada (Around There Is Nothing), both by Goyo Montero—the latter piece winning Ion first prize in the Madrid Maratón de Danza. In 2008 Ion joined, as an inaugural member, the La Mov de Zaragoza company, directed by Víctor Jiménez. In April of the same year he entered the Corella Ballet under the directorship of Ángel Corella, where he worked with choreographers suchas as Natalia Makarova, Clark Tippet, Twyla Tharp, Christopher Wheeldon, Stanton Welch, Rojas y Rodríguez and Ángel Corella himself, among others.
In 2012 he was invited to take part in the gala Los Vascos y la Danza and was singled out as a dancer to look out for in the future by the magazine Dance Europe. That same year he joined the Royal Ballet of Flanders dancing choreographies by Jacopo Godani, Ashley Page, Edward Clug, Cameron McMillan, Demis Volpi, Sidi Larbi Cherkaoui, Balanchine, Glen Tetley, Christian Spuck, Jiri Kylian, Kurt Jooss, Nicolo Fonte, John Cranko, Hans Van Manen, Slava Samodurov, Alexander Ekman, Alexei Fadeyechev, Marcia Haydée and Maurice Béjart.
In April 2013 Ion won the Premio Revelación from the Guipúzcoa Association of Professional Dancers. In October 2015 he was invited by Gruber Ballet Opéra, together with his partenaire Cristina Casa, to dance with soloists at the Ópera de París, in Carcassonne (France). Their dance was a pas de deux created for them by the Spanish choreographer Altea Núñez. The partners have also been invited recently to dance at the Etoile Ballet Gala 2015 in Latvia.
September 2016 marks his entry into the Compañía Nacional de Danza, directed by José Carlos Martínez.