Born in 1983 in the Ardennes, Guillaume Massart alternately directs, produces or edits creative documentaries.

In 2010, he became one of the three founders of the production company TRIPTYQUE FILMS.

After 11 short films, his first feature, In The Open, was released in French cinemas in February 2019.

A second feature, Detention, which TRIPTYQUE FILMS is co-producing with TS Productions, is currently in editing, hoping to be released in 2026.