The goal of COOP+ (Cooperation of Research Infrastructures to address global challenges in the environmental field) splinter meeting is to strengthen international scientific cooperation and data exchange of the users and managers of the European RIs and their international counterparts. The objective of this meeting is to gather broadly different environmental RI managers and their users to discuss on collaboration and to share knowledge of the best practices about the following key topics: RI design and site set-up based on experience; Sensors, technology and data processing development; Data management solutions; RI service provision and access management; Best training solutions; and on Communication strategies.