The following document defines the first version of the TIME4CS Knowledge sharing and Mutual Learning plan which is meant as a guide for TIME4CS partners in the organization of the activities foreseen in the Knowledge sharing and Mutual learning programme between Front-Runners and Implementers and in the co-designing of Implementers’ roadmaps with their local stakeholders. The plan describes the framework of mutual learning and knowledge exchange designed to support the implementation and the evaluation of the Grounding Actions that will be carried out during TIME4CS lifetime, leading to long-term Institutional Changes in the implementers’ institution with the ultimate goal to encourage Public Engagement and Citizen Science in science and technology. This document defines the approach, contents and type of activities of the mutual learning process which will be developed throughout the TIME4CS project and it will shape the Knowledge Transfer from Front-Runners to Implementers (T3.2) and the Mentoring Programme (T3.3). The types, scope, workplan, schedule, and reporting system of the events are described in this document.