After starting his career with Los Tañidores, releasing a single "Cerrado por balance" in 1967, Egaña passed through a number of bands including Combination Five and Los Snobs. He joined the blues rock group Los Buenos
in 1968, who enjoyed a period of commercial success in their native Spain, releasing four singles. Other members included organist Rod Mayall, brother of British blues icon John Mayall.
In 1970, Egaña joined two ex-members of Los Brincos, drummer Fernando Arbex
and Colombian guitarist Oscar Lasprilla to form Alacrán
, a Latin rock trio following a musical path similar to that of American band Santana. They released one self-titled album, which again was successful in Spain. When Lasprilla moved to England, Egaña and Arbex formed Barrabás, recruiting several other experienced musicians, and went on to have hit singles across Europe and also in the United States.
Arbex removed Egaña from the group after the recording of the Wild Safari
album, and Egaña subsequently played bass guitar for Miguel Ríos
. He then embarked upon a solo career, working with drummer Kiko Guerrero, releasing a hard rock album Karma
(and two singles) in 1974. He also wrote songs for the first album by Spanish singer Juan Camacho. In 1976, Egaña and Guerrero teamed up with guitarist Manuel Rodríguez to form Imán
, releasing several albums during the late 1970s.
In 1983, Egaña returned to Barrabás for the recording of the Forbidden
album. In 1999, he began his involvement with Dr Blues Band
,and continued performing with the current incarnation of Barrabás, as well as with Basque musician Goio Gutiérrez. He spent several years working with singer Juan Pardo, recording three albums, and later recorded an album with Los Mitos. He has also worked with a new group called Caeman including musicians such as Diego Fopiani, Paco Delgado and Blas Lago.