George Youssef began working as a comic artist for the publications of Rolf Kauka in 1968. He started out drawing for the preschool magazine Bussi Bär. He was mainly working for Fix und Foxi between 1969 and 1971. In 1969 and 1970 he was the main artist for 'Diabolino'. Youssef continued to draw 'Fix und Foxi' comics throughout the 1970s. In the late 1970s, he made the illustrations for the section 'Lach mit Fix und Foxi'.