Hernández played internationally with the senior Spanish men's national basketball team, in 41 games.

He became the head coach of Real Madrid in 1962, and with them he won 2 Spanish League championships, in 1963 and 1964.

He also won the premier European-wide competition, the FIBA European Champions Cup (now called EuroLeague) championship, of the 1963–64 season.

He coached Spain at the EuroBasket 1963, and he also led them to the silver medal at the 1963 Mediterranean Games.

Hernández died at age 31, in Madrid, Spain, on 20 January 1965, from liver disease.