She is best known for being the frequent collaborator of director Céline Sciamma.
[1] Fournier began work as a cinematographer in 1998.
She began working with director Céline Sciamma on her 2007 debut film Water Lilies.
They continued their collaborations of the films Tomboy and Girlhood.
[2] In 2016, Fournier was invited to join the cinematography branch of the Academy of Motion Picture Arts and Sciences.