[1] He began his senior career in 1977 with Real Carabanchel in the Tercera División, and spent two seasons there before taking a step up with Díter Zafra in 1979.
[2] He made his Segunda División B debut with Díter Zafra on 23 September, coming on at half time in a 2–1 away loss to Lleida at Camp d'Esports.
In his third match, away to Ceuta at Estadio Alfonso Murube on 7 October, he also came off the bench for the second half, and scored his first goal for the club with 13 minutes remaining.
[9] On the club's return to the third tier, Hernán continued to be an important part of the team, but his number of appearances would decline steadily over the following four seasons.
His next appearance, and home debut, didn't come until 4 November, as he played the last 11 minutes of Yeclano's 3–1 win over Olímpic de Xàtiva.
Ultimately, he made eleven appearances that season in all competitions, scoring just once: in the 5–2 win away at Torrent on 14 April, which was also the only match in which he played the full 90 minutes.
They placed an excellent 7th in their first top flight campaign, but following a 3–1 home defeat at the hands of Real Zaragoza on 13 December 1992, they slipped into the relegation zone.
[12][13] Head coach Julián Rubio was sacked, and Hernán and Ginés Meléndez were appointed joint caretaker managers.
[citation needed] Later, Hernán was appointed as Albacete's technical secretary, a post which he left after the 1996–97 season, following the club's relegation from La Liga the previous year.