After 1962, he shared a studio with Esteban Maroto and Adolfo Usero, executing war stories for Editorial Maga and the series Buck Jones.
In 1967-1968 he worked at Delta 99, a science fiction series, and produced several humour stories for the German market (Tom Berry and Kiko 2000).
In 1982 Giménez launched his most famous series, Los profesionales, depicting the economical background and personal deeds of people producing comics in Spain.
In 1989 he published the first of the 51 Historias de sexo y chapuza, short stories without a fixed character, about the use of sex and erotism in creative.
His later works include Bandolero (1987); Une Enfance Éternelle' (1991, script by Christian Godard), and Jonás, la isla que nunca existió (1992-2003), the latter published directly in the Internet, the adaptation of El capitán Alatriste (2005, with art by Joan Mundet) and 36-39.