Dr Gabriel Hemery is an author, tree photographer, and silvologist (forest scientist). Gabriel writes, lives, and breathes trees. He has published a number of both fiction and non-fiction books, while his tree photography has adorned books and international advertising campaigns. A forest scientist by training, he cofounded Sylva Foundation to help nurture a wood culture.

He has served on a number of boards and committees, including the Woodland Trust's Conservation Advisory Committee, a Forestry Commission Advisory Committee, and the Board for the UK Tree Charter. He currently chairs the Forestry and Climate Change Partnership. Gabriel was a founding trustee of Fund4Trees. He regularly gives technical talks and has served as a guest lecturer at the University of Oxford. Gabriel is a Fellow of the Institute of Chartered Foresters.