After three years working in Argentina, his editor advised him to try his luck in the United States. He had reached a certain ceiling in the regional market. In 1979 he went to New York City, and his first U.S. work was inking for Marvel Comics was "Marvel Team-Up" #88 (Dec. 1979) featuring Spider-Man and the Invisible Girl, with script by Chris Claremont and pencils by Sal Buscema. The same afternoon he got that assignment, he also received a Hawkman origin story for "World's Finest Comics" #261 from DC Comics, and a horror story from Western Publishing. After a few months he returned to Uruguay, but he would go back to the United States in 1983. He would live there for about three years, working first on the Archie Comics superhero imprint Red Circle, particularly in "The Shield". Three or four months later, he started to work on "Superman" for DC, and on other things for Marvel and Western as well.