Ángel Eduardo Viadero Odriozola (born 3 January 1969) is a Spanish football coach, who is currently in charge of Sestao River Club.

[8] In his first season in the Basque Country, the side won their group but were eliminated 3–2 on aggregate by Gimnàstic de Tarragona in the play-off semi-finals.

Following two full campaigns at the club and Burgos CF, he withdrew from his two contracted years at the latter and returned to Racing, being named manager of their first team, now in division three.

[9] Days after being denied a first career promotion to Segunda División via a 4–1 play-off final loss to FC Barcelona B, Viadero was given a second year in the hotseat at the Estadio El Sardinero on 30 June 2017.

[11] On 12 August 2019, Viadero accepted his first foreign job, taking the reins at Moroccan Botola club Moghreb Tétouan for the upcoming season.