Among his most remembered roles are his portrayal of General Bernardo O'Higgins in Héroes and as José Luis Echeñique, the protagonist of El señor de La Querencia for which he won many awards.

Driven by the priests, in 1986 he emigrated to Santiago to study at the DRAN School of Dramatic Art Milostich's first audition for a play was in 1988, to work on La batuta.

Shortly afterwards, Milostich was invited to participate in Chronicle of a Death Foretold, where he met Alejandro Trejo, one of his great friends to this day, and whom he considers as his mentor.

However, Milostich's great leap came in 2007, when he played Bernardo O'Higgins in the miniseries Héroes de Canal 13, for which he was nominated for the Altazor Award in 2009.

[3] Thanks to Milostich's performance in the telefilm, the director María Eugenia Rencoret noticed him and signed him for two years for the drama area of TVN.

[4][5][6] Milostich finally returned to the stage in 2009 with the play El hombre de La Mancha at the Municipal Theater of Santiago, where together with the participation of Amaya Forch and the tenor Daniel Farias, he would interpret the idealist "Don Quixote".