He is a graduate in sciences of information from the Complutense University of Madrid and the European University of Madrid, and gained prominence directing and presenting, along with his wife and collaborator Carmen Porter, mystery investigation program Milenio 3 in Cadena SER,[1] after which they moved to television with the program Cuarto Milenio in Cuatro.

[2] In 2020 he created the YouTube podcast La Estirpe de los Libres, and the same year started presenting the divulgation program Horizonte, initially in Telecinco and later in Cuatro.

[17] He finished the show in September 2021 in order to focus on other projects, leaving his activity in YouTube to his secondary podcast La Estirpe de los Libres.

[20] In an article published in 2020, journalist Antonio Maestre accused Jiménez of being an "anti-Marxist" and having become a "guru to the far right in Spain" through his work while embracing a "deideologized" profile as TV host.

[35] 2010 saw Jiménez being handed the Insignia de Plata by the Spanish Society of Criminology and Forensic Sciences (SECCIF), along with Feliciano Trebolle, president of the Provincial Audience of Valladolid.

[12] After three years, he would receive the Medal of Professional Merit in the Congress of Applied Criminalistics I in Noia, as well as the 2018 Award for Support to Rare Diseases by the Hospital Clínico San Carlos of Madrid.

[37][38] In 2019, he was awarded the Gran Cruz de las Víctimas del Terrorismo, by the Historical Association of the Civil Guard, for his work in Cuarto Milenio.

[42] Also for his work in the pandemic, Jiménez received in 2021 the Honor Award to the Best TV and Radio Communicator by Fundación Gala.

[43] Horizonte would earn him the Gran Cruz a la Solidaridad COVID-19 of the Civil Guard and Jiménez's third Antena de Oro, coinciding with him winning the Arturo Duperier Award also in 2022.