Рекопа Южной Америки
Domínguez played for L.D.U. Quito from 2006 to 2016, taking over the starting spot from José Francisco Cevallos. He won two Ecuadorian Serie A titles, the 2009 Copa Sudamericana, the 2009 Recopa Sudamericana and the 2010 Recopa Sudamericana .