He has developed a multidisciplinary career of great importance in mural painting, graffiti, ceramics, graphic design, sculpture and audiovisuals. He is a socially engaged artist who collaborates with young people from disadvantaged neighbourhoods.

Osier has a strong reputation throughout Spain as a muralist and multidisciplinary artist. His stylistic language is extraordinarily innovative, moving away from traditional figurative painting to create his own iconography. This is characterised by bright, harmonious colours and humanised figures that appear to have emerged from animation. This iconography and chromaticism also allude to historical avant-garde movements and constructivist compositions: Fernand Léger, Le Corbusier and Piet Mondrian are some of his references. He has extensive experience in urban art and mural painting for festivals, institutions and brands. He has participated in numerous exhibitions in Spain and across Europe.