After attending the Academy of Fine Arts in his native city, Rome, Rotundo made his debut as comics artist in 1978 in collaboration with Eura Editoriale.
Later he worked for other publications, like L'Eternauta, Comic Art, Orient Express, Heavy Metal and Ècho des Savanes.
In Italy, his work includes several projects with Sergio Bonelli Editore, starting with his drawings for the comic book Brendon.
He drew for Bonelli Editore Tex "Storm on Galvestone" for the editorial series Albo Speciale "Texone".
As a sketch artist he has worked on the films Crusade (never made) by Paul Verhoeven, Titus by Julie Taymor (Academy Awards nomination for costumes), The Wolfman by Joe Johnston and Gangs of New York by Martin Scorsese.