Career
Born in Vitoria-Gasteiz, Álava, Basque Country, Spain, Koldo played his entire career in the country. He signed in the 1991 January transfer window with Atlético Madrid, from local Civil Defense Aurrerá de Vitoria, but struggled to appear even for the reserves. Due to injury to main squad first-choice Abel Resino, he was on the substitutes bench in the 1990-1991 Copa del Rey final, against RCD Mallorca.
Koldo resumed his career in the lower leagues, being second or third-choice.
In 1994 he signed with Football Club Andorra which competed in the Spanish football league system, going on to remain with the club for 14 of the following 15 seasons and retiring at nearly 39 years of age. After being naturalized, he began appearing with the Andorra national team, making his debut on 3 June 1998 in a 0–3 friendly loss to Brazil.
Arguably one of the best players in the match, he received a standing ovation from the opposing fans for his efforts, after he was substituted in injury time. Previously, in November 2003, to celebrate Union of European Football Associations"s Jubilee, he was selected as Andorra"s Golden Player by the Andorran Football Federation as their most outstanding player of the past 50 years.
On 2 February 2010 Koldo was appointed as the Andorra national team"s manager, replacing David Rodrigo.