With the beginning of World War II – in order to avoid being drafted in the Swiss army – he moved to Milan to join Studio Boggeri.
When Italy entered the war in 1941, Huber was forced to move back to Switzerland, where he began a collaboration with Werner Bischof and Emil Schultness for the influential art magazine Du.
He joined the group Allianz, and in 1942, he exhibited his abstract work at the Kunsthaus Zurich with Max Bill, Leo Leuppi, Richard Lohse and Camille Graeser.
The job put him in contact with the post-war Italian intelligentsia: Cesare Pavese, Natalia Ginzburg, Elio Vittorini, Franco Fortini, Ettore Sottsass, Achille Castiglioni and Albe Steiner [it].
In 1948, he designed the seminal poster for the Autodromo Nazionale di Monza Grand Prix and two years later the corporate identity for the supermarket chain La Rinascente.