The two brothers Raoul and Robert Giordan were born in Nice. The Giordan family left the city in 1936 to run a hotel in La Colle-sur-Loup. When their father was mobilized during the war, Raoul and Robert worked at the hotel. They eventually went to work at an animation studio in Nice, where they met Marc-René Novi. Novi introduced them at the publishing house Publi-Vog, where they made their comics debut in 1946.
They started a collective oeuvre, starting with the cooperation on several collections of complete stories, such as Bagarre, Aventure et Mystère, Mystère et Police, Vog Aventure and Tim L'Audace. In 1950, they joined the atelier of Maurice Bourdin, where they did assignments for the publisher De La Foux until 1953. While doing a variety of illustration work together, Raoul Giordan began doing caricatures and humorous illustrations for Ici Paris, Le Hérisson and Marius on his own.
In 1952, Robert and Raoul Giordan joined the publishing house Artima, a collaboration that lasted for several decades. They worked with numerous characters, such as 'Franck Nevil', 'Tom Tempest', the space family 'Les Francis', 'Bob Corton', 'Vigor' and 'Thierry'. These series appeared in magazines such as Météor, Dynamic, and many others. In the 1970s the brothers made comic adaptations of the science-fiction novels of publisher Fleuve Noir. From 1975, Raoul focused more on painting. In 1983, the brothers finally left the comics field. After the death of Robert, Raoul briefly returned to the field with 'Space Gordon' written by André-Paul Duchateau in 1993.