He is Creative Director of Fresh Start Media[1] and the first Head of Content for the new global environmental streaming platform Ecoflix.
Marshall has been the showrunner on Discovery's top global hit Gold Rush,[3] and he also developed and produced the BAFTA-winning CITV series Bear Grylls Survival School.
He is the author of a book to accompany the series: Extreme Survival: An Adventurer's Guide to the World's Most Dangerous Places (foreword by Bruce Parry).
[8] In addition he has written several other children's factual books, and he co-authored Undercover,[9] documenting unprecedented secret filming in sub-standard Romanian and Turkish orphanages with the involvement of the Duchess of York and her daughters Princesses Beatrice and Eugenie.
He has also been a Senior Producer in BBC factual programmes, making shows such as Tomorrow's World, Megalab and the 1999 Total Eclipse.