Dominic is a survivor featured in Dead Island. He is first seen when the Hero awakens to the sight of Jack shouting at them with a baseball bat. Dominic is trying to calm Jack down when they realize that the Hero isn't infected.
Once the group moves to the Lifeguard Tower, he gives the Hero the quest "On the Air," in which the Hero must head to the Lighthouse and retrieve parts for the antenna that he is attempting to repair. Once he receives the parts, he goes to the antenna and starts working on it. During the quest Bird on the Roof, Sinamoi claims that Dominic went missing during an attempt to repair the hotel's antennae.
But it can still be seen that he appears in the cutscene, which appears after the heroes enter the hotel radio control room in Act III.
He is, after that, no where to be found as he has nothing more to do with the plot.