Born in Buenos Aires, Guillermo Guerrero began his professional career in 1938. He initially was the assistant of Lino Palacio for a period of 9 years. His first comic was 'Villa Mosquete, 1625' and it was published in the newspaper Diario La Razón. In 1947 he joined Guillermo Divito's team of artists for the magazine Rico Tipo. He remained with this magazine until its demise in 1973.
Guerrero has additionally contributed to magazines like Don Fulgencio, Bicho Feo, El Laborista, El Hogar, Mundo Deportivo, Antena, Tip-Bits, Campeón, El Trencito, La Revista Dislocada, Tibor Gordon, Popurrí, Figuritas, Avivato, Bomba H, Afanancio, Piantadino, Loco lindo and Picardía y Petitera.
Mosca Kid (Lupin #217, October 1983)
A pilot himself, Guerrero is best known as the creator of 'Lupín, el Piloto'. The character first appeared in Capicua y Piantadino magazine in 1959, and later on it got its own title. He has created comic characters like 'Leré Leré', 'Tatita', 'Riverito y Bocarin', 'Canelón el utilero', 'Rubita', 'Tanguito y Langosta', 'Al Feñique', 'Piedrito y Saurito', 'Lupin, el piloto' and 'Moscakid'.
Piedrito y Saurito (Lupin magazine #218, November 1983)