Juan was born in Argentina and moved to the Netherlands in his teens. After graduating from the Royal College of Art in London, Juan worked as a children's book illustrator, winning the Kate Greenaway Medal for Sir Gawain and the Loathly Lady. Juan lived in the U.K. for nearly 20 years. After illustrating some 35 books, Juan retired as a children's book illustrator.
Juan now lives and paints in New Mexico, USA. The natural beauty of the environment, fauna and flora are inspirations to him.
Although he now works mainly in oils, Juan continues to deepen his knowledge of old world techniques, including egg tempera on wood panels, gold leaf, and glazes.