He made his international debut on 12 October 1988 in a friendly with Argentina played in Seville, and was selected for the 1990 FIFA World Cup squad, appearing against Uruguay in the group stage (0–0)[3] and against Yugoslavia in the round of 16.

[7] Jiménez took the team to the final of the Copa del Rey in 2010, notably beating Pep Guardiola's Barcelona in the last-16 stage on the away goals rule.

[13] On 5 October, he left the club by mutual consent;[14] he had been nicknamed "Papatzis" by local newspapers in a reference to the shell game, because of his frequent tactical changes.

Jiménez returned to AEK on 19 January 2017, succeeding José Morais who had resigned the previous day; he signed a deal until the end of the season, extendable by one year subject to satisfactory performance in domestic competitions.

[20] He oversaw the team's qualification to the group stage of a European competition on 24 August (after a six-year absence), following a 3–0 home win against Club Brugge in the Europa League play-off round.

[23] The same day, Jiménez agreed on a return to Spain and was appointed manager at Las Palmas, who had been relegated from the top flight the previous season.

[30] One year later, he was named advisor at Paraguayan Primera División club Cerro Porteño;[31][32] five months after arriving, he was appointed head coach of the latter.