After a long internship at Les Inrockuptibles, Mathieu Fonsny founded the Forma.T label and events. He then joined the programming team of the Francofolies de Spa in 2005 before deciding to get 100% involved in Dour Festival since 2013. Since then he founded KuratedBy creative agency who’s in charge of the line up for Dour, Marsatac, Peacock Society, ... Since 2019, he also created Fifty Lab, a showcases festival in Brussels based on a collaborative way of programming with other festivals bookers.