Triet graduated from the Ecole Supérieure des Beaux-Arts. Together with authors such as Antonin Peretjatko, Sophie Letourneur and Vincent Macaigne, she is part of the new generation of French artists that emerged at the beginning of this decade. She is the creator of short films like Sur Place (2007) and Vilaine fille mauvais garçon (2012, EFA Award for Best Short Film), and documentaries such as Solférino (2009) and Des ombres dans la maison (2010), but it is with her first fiction feature film that she got to make her mark on the film scene: The Battle of Solferino (2013), premiered at Cannes. This festival also premiered Los casos de Victoria, and Sibyl, in the Critics' Week and the Official Section respectively.
Festival de Cine de Sevilla