This document presents the first version of the roadmap from each Implementer in support of Institutional Change for Citizen Science and public engagement. The roadmaps provide a detailed and tailored action plan for each Implementer, defining their short-term goals (the Grounding Actions to be carried out during the project lifetime) as well as providing the basis for medium- to long-term progress. The roadmaps are intended to be living documents and are expected to be updated on need basis along the lifetime of the project. Formal revisions of the initial roadmaps are scheduled for December 2022 and December 2023. The document comprises seven chapters, including the Introduction. Chapter Two (Background) provides a brief theoretical background of Citizen Science and public engagement in science, as well as Institutional Change in this context. Chapter Three (The Roadmap Development Process) describes the activities undertaken to support the creation of the roadmaps and the design of the Grounding Actions, as well as how these relate to the overall project. Chapters Four to Seven set out the roadmaps and planned Grounding Actions for each of the four Implementers. This document was drafted by the European Science Foundation. The structure is based on the Deliverable 3.2 ‘Definition of Grounding Actions and roadmaps towards RRI’ developed by Luciano d’Andrea and Giovanna Declich (Knowledge and Innovation SLRs) for the EC-funded GRACE project [GA 824521].