The CERISE Consortium is comprised of 12 partners from 9 European countries (Denmark, France, Germany, Italy, Norway, Portugal, Spain, Sweden, and the United Kingdom). Through ECMWF (an International European Research Organisation), the reach is extended beyond these countries due to the member and cooperating states of this international organisation. The partnership has been chosen to bring together the expertise needed to deliver the objectives of the project. The coordinator, ECMWF, is the Entrusted Entity for the Copernicus Climate Change Service and has leading expertise in global reanalysis and seasonal prediction. This ensures very close links with the overall implementation process of the C3S evolution to which CERISE is contributing.