[1] Domínguez initially competed for the Cuban National Track and Road Team, where he achieved a Pan-American Gold Medal in 1997.

Despite facing language barriers and working in a Clothing Factory, he gradually gained success in local cycling races.

His return to high-level competition began in 2000 when he joined the elite amateur Cycle Science (FL) racing team.

Built around him, the small team embarked on extensive tours across the country, traveling from Florida to California, New England, and back to Wisconsin before he secured his first professional contract in August.

Subsequently, he rode for Colavita Olive Oil, Health Net, Toyota-United, Fuji-Servetto, Rock Racing and Jamis Sutter Home.