A coach since 1974, Miera started at the professional level with Real Oviedo, suffering top flight relegation in his second year, then moved to neighbours Sporting, where he would remain for five years, except for the 1979-80 campaign at RCD Español.
Having already served as assistant during four years, Miera was handed the reins of the national team in 1991,[REF] remaining there for seven months as the nation failed to qualify for UEFA Euro 1992.