He emigrated to New York with his family in 1940. They settled in Brooklyn, where he spent most of his childhood. He studied art at the Cooper Union for the Advancement of Science and Art (New York) and later at Yale University. In 1960, he entered the Art Institute of San Francisco, and in this city he developed a successful career as a designer of rock concert posters and album covers for bands such as Grateful Dead (whose leader Jerry Garcia was also the son of a Galician). Some of his posters are part of the collection of museums such as the Louvre (Paris), the MOMA (New York) and the Victoria & Albert Museum (London). The Smithsonian American Art Museum says he “was the first of the rock poster artists with academic training and experience”. Moscoso also drew for magazines such as Zap Comix, the origin of “comix underground” and where artists such as Robert Crumb also published (Sources: David Pintor, “El dibujante gallego que hizo vibrar los carteles de la psicodelia americana”; Moma, “Victor Moscoso”; The Smithsonian American Art Museum, “Victor Moscoso”).