David O’Keefe is an award-winning historian, documentarian and professor at Marianopolis College in Westmount, Quebec. He served with the Black Watch (Royal Highland Regiment) of Canada in the Canadian Forces in Montreal and worked as a Signals Intelligence research historian for the Directorate of History and Heritage (DND). He has also created and collaborated on over 15 documentaries for History Television and appeared on CBC Radio, Global Television and the UKTV Network in Great Britain.

He wrote and produced the groundbreaking documentary Dieppe Uncovered, which made headlines around the world, as well as the documentary Black Watch Snipers, which aired on History Television in November 2016. He is also the writer, producer and personality of the History Television program War Junk, in which he and his partner, Wayne Abbott, tour the battlefields of Europe for lost items from Canadian soldiers and reunites them with the families of the veterans. He is the author of One Day in August: The Untold Story Behind Canada’s Tragedy at Dieppe, which reveals in full, for the first time, the Ultra Secret story behind one of WWII’s most controversial mysteries—and one of Canada’s most sorrowful moments. One Day in August was a national bestseller, a Globe and Mail Best Book of the Year, and a finalist for the RBC Taylor Prize.

He is highly active in the media, is extremely well connected and is an accomplished public speaker. He attended IFOA the year he was a finalist for the Taylor Prize. O’Keefe lives and works in Montreal, Quebec, with his wife and children.