Jean-François Dagenais (born October 16, 1975) is a Canadian record producer, recording engineer, mixer, guitarist, and songwriter. He is best known as guitarist for the death metal band Kataklysm and for producing and mixing many heavy metal albums and its subgenres.

J-F works out of his own studio, JFD Studio, currently located in Dallas, Texas where he now lives as a naturalized citizen of the USA. He received a Canadian GAMIQ award “Metal / Hardcore Album of the Year” for both his work on Kataklysm's 2010 Heaven's Venom and 2008 Prevail albums, as well as winning a award with Kataklysm for "Best Metal Group" at the Canadian Indie Music Awards. J-F is also well known for his work with bands like Malevolent Creation, Misery Index, Despised Icon, Augury, Blackguard & Ex deo.