This document details the actions carried out and planned to be conducted, goals, target audiences, and tools to communicate and disseminate the project services/results and engage with the potential ESiWACE3 community. It is the “Communication, Dissemination, and Exploitation Plan” (CDEP). The deliverable summarises the actions already performed and the mid‐term planned activities for the first 18 months of the project—1 January 2023 ‐ 30 June 2024—. This CDEP will be regularly updated with the periodic reports due in months 18, 36, and 48.