Mercator Ocean International (MOi), based in France, is a non-profit organisation providing oceanographic products that cover the global ocean. Its scientific experts design, develop, operate and maintain state-of-the-art numerical modelling systems that describe and analyse the past, present, and near-future state of the ocean in 4D (reanalyses, hindcasts, near-real-time analyses and forecasts). MOi was selected by the European Commission to implement theCopernicus Marine Service in 2014. MOi was selected with ECMWF (European Centre for Medium-Range Weather Forecasts),EUMETSAT (European Organisation for the Exploitation of Meteorological Satellites), to develop and offer skilled user support for theWEkEO DIAS cloud computing platform, which provides a comprehensive portfolio of original Copernicus Programme and Sentinel satellite data and information.