In 2016, Domínguez was loaned to CF Damm for one year, to finish his formation; upon returning, he was assigned to Espanyol's B-team also in the fourth division. He featured sparingly for the side, and renewed his contract until 2020 on 22 March 2018.[1]
On 27 July 2021, after losing his starting spot back to Valles, Domínguez was loaned to second division newcomers UD Ibiza for a year.[6] Upon returning, he was again a backup to Valles as the club achieved promotion to La Liga.