He started in 1990 on small radio stations in Madrid until he went to some of the most important Spanish radio stations: Onda Madrid, Radio Voz, Radio Intercontinental, Antena 3, Onda Cero, Cadena SER and Radio Nacional de España. He has also worked in TV programs for Telecinco, Antena 3 or Cuatro TV. He founded the CD-Rom magazine, CD Magazine and wrote some articles for several publications.
He has been the presenter and director of the radio program Milenio 3 in Cadena SER. Milenio 3 was the leader program in the Saturday late night Spanish radio and also in other schedules in which it was previously broadcast. Milenio 3 came to an end on June 28th 2015, after 14 seasons on air. 
He currently presents the television program Cuarto Milenio (Fourth Millennium). Started in 2006, Cuarto Milenio is the most popular program of the Spanish channel Cuatro and the oldest of the programs broadcast by Cuatro. 
He is married to Carmen Porter, also a journalist and team member of both Milenio 3 and Cuarto Milenio. His first daughter, Alma Jiménez Porter, was born in 2011.
- Enigmas sin Resolver I (EDAF 1999, 8ª edición)
- El Paraíso Maldito (2000, Corona Borealis)
- Enigmas sin Resolver II (EDAF 2000, 5ª edición).
- Camposanto (Suma de letras 2005), based on Hieronymus Bosch's life.
- Milenio 3: El libro (Aguilar 2006)
Notable television works
- La noche del fin del mundo (director of that documentary about the Chernobyl disaster)
- "Iker Jiménez: CUARTO MILENIO en Cuatro.com". cuatro.com. Retrieved 6 July 2010.
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