Oliver's work specializes in mixed-media collage. He crafts each piece with attention to detail and a variety of materials, including paper, paint, and fragments from photos, magazines, books, and postcards. He seeks to uncover "hidden stories" through the DADA-inspired process of freely sampling and remixing elements. The result is a composition that speaks with its own unique voice.
Oliver's work has been exhibited worldwide, and appeared in numerous publications ranging from The New York Times, Süddeutsche Zeitung, DIE ZEIT, The Christian Science Monitor to DER SPIEGEL.