Born in Ovalle, IV Region of Coquimbo, Acuña joined Santiago–based club Unión Española youth set-up where was promoted to the first adult team in 1999.
After spending a season with the Spaniards, in January 2000, he moved to powerhouse Universidad Católica where he helped the club to win the 2002 Torneo Apertura, being a key playing in the title earning.
After completing 24 league appearances, Acuña finished his spell at North Brabant and later was released from Feyenoord in January 2006 which didn't renew his contract.
[9] After coaching the under-17 football team of the commune Santa María,[9] on 2020 he began his managerial career as manager of Unión San Felipe at under-17 level.
[10] In November 2020, after Unión San Felipe changed his technical staff, Acuña became assistant coach of Héctor Roco,[11] the manager of the first team.