The OSCARS project aims at combining individual cluster-based key activities and new shared strategic pathways towards two major objectives: (A) consolidating achievements from the five H2020 INFRA-EOSC-2018-01-04 projects into lasting interdisciplinary services and working practices; (B) leading and fostering the involvement of a broad range of research communities in EOSC via the development of new open science projects, that together will drive the uptake of FAIR-data-intensive research throughout the European Research Area (ERA).