The Centre des monuments nationaux (CMN) preserves, manages, and opens to the public over a hundred monuments, ranging from Prehistory to the 20th century, including nineteen that are inscribed on UNESCO's World Heritage list. Since 2021, SISSO has been collaborating with the CMN teams on audiovisual production projects. The agency has been responsible for the conception and realization of a motion design video for the exhibition "Le retour des portraits de la Renaissance" (The Return of Renaissance Portraits) at Château d’Azay-le-Rideau.
Currently, the agency is tasked with producing an introductory film to be presented at the beginning of the visitor's journey in the house of Ernest Renan in Tréguier. As of 2023, SISSO is also part of the framework agreement for the creation of multimedia productions designed for people with reduced mobility, intellectual disabilities, and visual impairments.