The Expert Team on Climate Services Information Systems for Decision Support (ET-CIDS) guides the development of CSIS at global, regional, and national levels, supporting National Frameworks for Climate Services, Regional Climate Centres, and Climate Forums. It advances sub-seasonal to decadal prediction, oversees global climate updates, and promotes user-tailored products and co-produced information to inform adaptation, mitigation, and Early Warnings for All (EW4All).