Dewald studied film production at the Pretoria Film School in South Africa in the early 1980s. In 1985 he, with like-minded friends/filmmakers founded a non-profit cooperative, Free Filmmakers, with the specific aim of producing anti-apartheid films and educating previously disadvantaged people in film production. Over the last 32 years he has photographed more than 300 documentaries, many TV drama series and 9 feature films. Two films he photographed have been nominated for Oscars, three for Emmy’s (with two taking taking the top honor) as well as various other awards. Recent credits include “Martin Luther King & The March On Washington” and Sundance-selected “The Stuart Hall Project”, both directed John Akomfrah.