For more than twenty years, Mattie exhibits her work in figurative galleries, in museums, in public locations and in various exhibitions. For example, her work was shown at the International Biennale of Contemporary Art in Florence (Italy), at Unilever’s headquarters in Rotterdam and at Museum ‘t Coopmanshûs in Franeker. She has had solo exhibitions at Galerie De Twee Pauwen in The Hague and Galerie Wildevuur in Hooghalen and participated in exhibitions at a.o. Galerie ZoFier, Mebius, Museum Møhlmann and the Holland Art Fair in The Hague.
During the art month (Kunstmaand Ameland) her paintings were shown at various locations on the island. A special event was the exhibition “Laudate Dominum” in the Jacobijner Church in Leeuwarden, where she joined with her project “Amen”. It consisted of a large panel with 49 hand portraits, purchased for the silence room of a church.