As the dissemination of knowledge and scientific influence are structuring values of the université Paris Nanterre in France, the institution adopted an ambitious open science policy in 2021. The institution's strategy has acted a very strong awareness of the necessary support and reinforcement to be given to the pillar infrastructures of open science. ** Nanterres' vision of open science The challenge is to develop an original political vision for Nanterre, one that reflects its human and humanistic values and realities. The institutions's open science charter and its roadmap are structured by strong commitments in favour of the development of open science, particularly in SSH, which give rise to the implementation of concrete actions. Among these axes, there is one specifically dedicated to the support of open science infrastructures. This support often takes two complementary forms: financial support for structures that often have a fragile economic model; participation in the governance of organisations that are building the future of academic research. ** Method, criteria and support modalities This poster focuses on how this specific provision of support and participation in the governance of open science infrastructures operated by the Library on behalf of the institution has been conceived and built in order to fit in with the university's open science strategy and in complementarity with its participation in national and international networks related to open science issues. This have been beneficial to the open science pillar infrastructures by providing funding and promoting strong and sound governance in the open science ecosystem, to the university in terms of strengthening its positioning and its internal dynamics in favour of open science, and to the library in terms of developing innovative, forward-looking and high value-added services that promote access to research results. ** Priorities, risks, benefits: assessment and perspectives Finally, the poster presents the criteria used for the selection of the infrastructures in 2022 and 2023 and draws a quick assessment of the risks identified and the benefits derived by the institution and the library; it states the perspectives and priorities and presents how this is considered as a real investment for the future.

This poster was presented during the 4th Open Science Fair (25-27 September, Madrid, Spain)