The bulk of Hiersoux's paintings and collages were created and exhibited between 1961 and 1967. Praised from reviews in Art Forum, to the SF Chronicle, his works were exhibited in 4 major one-man shows In addition to painting, Hiersoux set his sites on mountaineering and aviation, founding both the The Northface and ZOOM ZOOM Airlines, and proving his entrepeneurial vision to be as impressive as his works of art.