Jesús Saiz began his career in the mid-1990s, drawing for the fazine 451º, and the mini-series 'Azoth' for Camaleón Ediciones. He also provided cover illustrations of 'Conan', 'Star Wars Manga', 'Xenozoic Tales' and 'Adolf y Buda' comics for Planeta-De Agostini. In 2000, he went to work for the US market, starting with several assignments for Dark Horse. He then did mini-series like 'JLA: Black Baptism' and 'Midnight, Mass' for DC and DC/Vertigo. For DC's Wildstorm imprint, he worked on the critically acclaimed series '21 Down'. He worked with Greg Rucka on 'The Omac Project' and 'Checkmate'. He works in a studio with David Lopez.