Matthijs works as a the head of development for Lemming Film for film and television projects of various lengths. Before joining Lemming, he practiced story editing at the Dutch public broadcaster NTR, where he mostly focused on talent development.

After attaining his MA in Film Studies at the University of Amsterdam, Matthijs worked for the children's film festival Cinekid, as well as International Film Festival Rotterdam. For the former festival, he, among other things, produced the Cinekid ScriptLAB.

In 2016, Matthijs was selected as a jury member for Venice Days competition through the 28 Times Cinema programme, and consequently functioned as an ambassador for the LUX Film Prize. Additionally, Matthijs is an alumnus of the 2018 edition of the TorinoFilmLab ScriptLab.