cullingham has also served as an executive producer with the canadian broadcasting corporation (cbc). in 1989 he formed tamarack productions to produce canada's first national documentary series on aboriginal issues featuring the work of indigenous and non indigenous filmmakers. since then cullingham has made documentaries in canada, the united states, europe, africa, the middle east and pakistan. his films on history, politics, popular culture and social justice have been screened around the world. cullingham has been published by canada’s leading newspapers and magazines.