These are the slides from the LIBER 2021 Workshop: Onboarding Citizen Science and the role of research libraries barriers and accelerators This workshop derives from the SSHOC - Social Sciences and Humanities Open Cloud work in collaboration with the LIBER Citizen Science working group. It will be building on the outcomes of the session“ Citizen Science: What it means for SSH and how can multidisciplinarity be achieved?” that took place during the conference “Realising the European Open Science Cloud: Towards a FAIR research data landscape for the social sciences, humanities and beyond.” in November 2020. Objective The overarching aim of this workshop is to raise the awareness of the challenges and opportunities in libraries’ involvement with Citizen Science in SSH. It aims to explore the extent to which research libraries can serve as a bridge between researchers and citizens. An approach based on the sharing of best practices and current research, the involvement of participants in the reflection of the respective roles and training needed, complemented by an open discussion, will shape the overall experience. One of the outputs of this workshop will be the production of actionable recommendations for research libraries and the SSHOC/SSH communities in the form of a report. This will be complemented by a proposed outline of potential awareness raising and training sessions (for librarians, researchers, and citizen scientists) that would help participants in implementing those recommendations. This workshop will be an opportunity to create further synergies between LIBER, SSHOC and initiatives represented by the speakers and the participants.