The current document, titled ’Second version of TIME4CS Clustering activities and user engagement activities report’, has been developed within the framework of the TIME4CS project which is funded by the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement No 101006201. The purpose of this Deliverable is to present an overview of the communication and dissemination activities completed by the TIME4CS consortium in the first 24 months of the project, in order to generate enhanced collaborations with other relevant international organisations and projects on the topic of Science with and for Society and/or citizen science (hereinafter referred to as “sister projects”). This report gives an overview of what clustering represents for TIME4CS and details what the project can offer from this perspective. The engagement strategy is also discussed and details are presented for each initially proposed collaboration. The document then presents an overview of the TIME4CS Case studies and the Citizen Science Helix. This report also discusses future plans that the consortium has in place in order to continue cross-collaboration activities.