After finishing his studies in Spain, he attended the Royal Flemish Conservatory of Antwerp where he studied clarinet with Walter Boeykens and bass clarinet with Jan Guns. Following this, he obtained a scholarship to study with Andrew Marriner on the Postgraduate Course at the Royal Academy of Music in London. He has also participated in master classes with Wolfgang Meyer, Antony Pay, Colin Bradbury, Joan Enric Lluna, Michael Collins and Josef Horack (bass clarinet).

A keen player of contemporary music, Iñigo Alonso has been a member of the Aquarius Ensemble in Holland, and the UK based Composers Ensemble, The New Music Players and The Opera Group. In Spain, he has played, Bilbao Symphony Orchestra, Galicia Symphony Orchestra and Liceo Theatre Orchestra. In July 1994 he was successful in gaining the place of principal clarinet doubling bass clarinet in the Pacific Music Festival Orchestra in Japan, and the following year in the Festival of Evian Orchestra in France. He has been Solo bass clarinet/clarinet with “deFilharmonie Orchestra Antwerpen” in Belgium and now he is currently a member of the Asturias Symphony Orchestra. He also works regularly with Champ D'Action and “Vlaams Radio Orchestra” in Belgium as bass clarinet. Founder member of Trio Bernaola (clarinet, cello, piano), he has participated in many festivals around Europe and South. In 2000 he gave the premiere of the bass clarinet concerto by K. Vlaak in Spain and returned in November 2002 to premiere Nino Diaz’s “Octubre”. He also has played as bass clarinet soloist with Banda Municipal de Oviedo y Banda de Tenerife.

He has given master classes at Bath University, “Simon Bolivar” University, “Jesus Guridi” Music School, Dartington Summer School, and teach in Buitrago Music School and St Aloysius College.