He is a member of the clergy in the diocese of Alcalá de Henares (Madrid). He combines his work as a theologian with his activity as pastor of Saint Mary Magdalene Parish, in Anchuelo (Madrid). Author of several books about Demonology, demonic possession and exorcism, every year he gives lectures in dioceses and universities around the World. He carries out his ministry of praying for persons who claim to be afflicted by the Devil in Our Lady of Zulema Parish in the diocese of Alcalá de Henares (Madrid, Spain). Because of the lack of exorcists, cases come all around the nation and other countries to his church and with a general permission of his bishop he prays for them.