Jeffrey Gallant started diving with the Royal Canadian Sea Cadets in 1982 at the age of 14. He has led several research and training expeditions around the world, most notably in Canada where he is co-director of the Greenland Shark and Elasmobranch Education and Research Group (GEERG). Among his most memorable accomplishments, Jeffrey was trained as an aquanaut in Romania in 1995, he is the former Chief Diver of the Quebec Aquarium, and he spent a few days diving aboard Cousteau's windship Alcyone in 1999.

An award-winning underwater photographer and videographer, he has contributed to several diving publications, books, as well as television and film documentaries on sharks and diving, including Discovery Channel, CBC, Radio-Canada, TV5, TQS, Canal Découverte and Télé-Québec. He has been a contributing editor of Vancouver-based DIVER Magazine since 1997. He became a diving instructor in 1995 and nows serves as a Course Director for CMAS Quebec. He was made an Honorary Member of the Diables des mers (Sea Devils) dive club in 2007. Jeffrey lives in Drummondville, Quebec, where he teaches at the local CEGEP (university prep college).