[6] In 1974 he defended his doctoral thesis in classical philology, supervised by the philologist Luis Gil Fernández, and entitled Teopneustia, estudio sobre la inspiración en los escritores de los siglos I y II ("Teopneustia, study on inspiration from writers of the 1st and 2nd centuries") at the Complutense University of Madrid (Luis Vives award granted),[7][8] although he completed most of his doctorate in Germany.

In 2016, he received the Trithemius award from the Sociedad de Estudios e Investigaciones Spagyricas y la Editorial Tritemio, for his contribution to the world of culture and his endeavour in all his facets to teacher, researcher and writer.

[10] As a result of his work in translating the non-canonical gospels, New Testament academic research, broad participation in dissemination activities and numerous publications, Piñero has become one of the most influential agnostic Spanish exegetes and authors in the study of the early Christianity (mainly the 1st and 2nd centuries).

[17][1] Similarly, he also addresses the first steps of the early Christianity trying to clarify the evolution of the first communities of followers of Jesus of Nazareth.

[31] In 2009 he participated as an advisor in the making of the film El discípulo ("The disciple"), whose plot addresses the life of Jesus of Nazareth.

[32] Given the popular and general audience of his seminars and published books on the person of Jesus of Nazareth, his conclusions are controversial for part of society.