Born and raised in Madrid and currently living in London, Guillermo has been inking comic books and illustrating books and magazines ever since he completed a degree in History in 2009.
On inking duties, he has worked for American publishers like Marvel, DC, Valiant and Dynamite Entertainment. Throughout the years, he has collaborated with renowned pencillers such as Jim Cheung, Emanuela Lupacchino, Ardian Syaf, Mikel Janin, Paco Díaz and Robson Rocha, and on books like X-FACTOR, AVENGERS, ORIGINAL SIN, SUPERMAN UNCHAINED, JUSTICE LEAGUE DARK, GRAYSON, EARTH TWO: WORLD’S END and BATMAN ETERNAL.
On the illustration front, he provided regular illustrations for MEDIAPUNTA Magazine between 2008 and 2014, as well as producing a series of portraits for Everest’s official Real Madrid biography collection. You can also find Guillermo’s artwork on the anthology NUEVE PREGUNTAS, DIBBUKS (2012) and on THE ORGAN GRINDER (2014, 2016) by Canadian publisher 7th Wave Comics.
More recently, he has produced work for the Spanish newspapers MARCA and EL MUNDO, illustrating covers and interiors for their daily editions, and their magazines METRÓPOLI and EL PAPEL. He’s also illustrated short stories and essays for the Spanish publisher Graphiclassic and FIREWORDS QUARTERLY, a UK-based literary magazine.