Aubertin met Yves Klein in 1957 and started making his first red monochrome works during 1958-59. In 1961, Aubertin officially joined the ZERO movement, which adopted new techniques paired with monochrome expression as a way of breaking with tradition. The same year, Aubertin added the medium of fire to his works. Both red and fire represented his own interpretation of ZERO's 'tabula rasa', rather than an aesthetic experience. In addition, the colour red is imbued with psycho-analytical interpretations and connotations and has peculiar optical effects on the viewer. From 1965, Aubertin moved into Conceptual Art with performances of controlled fire, in which the protagonists were books, pianos and sheets of metal.

Aubertin exhibited with the ZERO group in Frankfurt, Amsterdam, Rotterdam, Berlin and Milan.

His works are held in public collections, including Museo d'Arte Moderna e Contemporanea, Bolzano; Museum of Modern and Contemporary Art, Lisbon; The Norton Museum of Art, West Palm Beach, Florida; Stiftung für Konkrete Kunst, Reutlingen.