Born in Barcelona, Spain, Sanjulian studied at the Royal Catalan Academy of Fine Arts of Saint George. In 1962, he began working for the seminal Spanish illustration management and production company, Selleciones Illustradas, and by 1970, had caught the core attention of James Warren, who employed him as a central cover artist for the Warren Magazine lines, including key art pieces for Creepy, Eerie, Vampirella, and Warren Presents. During the same period, parallel to Marvel's Savage Sword of Conan magazine, Sanjulian also painted covers for a strong handful of Ace's Conan expansion paperbacks, creating one of the definitive looks for Robert E. Howard's hallowed hero. A master artist, painter and visual storyteller at large, Sanjulian's body of work stands alongside the 1970's cover paintings of Frazetta, Bob Larkin and Boris Vallejo as definitive and enduring fantasy and horror illustration.