The OECD Global Science Forum provides a venue for consultations and mutual learning among senior science policy officials of OECD member countries. Its overall objective is to support countries to improve their science policies and share in the benefits of international collaboration. Research Infrastructure Policy is one of the priorities in the current work programme of the Global Science Forum, as Research Infrastructures have attracted increasing attention from policy makers in recent years. The Global Science Forum has published a report on Very Large Research Infrastructures (VLRIs) in July 2023. A new activity on Research Infrastructure ecosystems has started in May 2023. The webinar will be the first of a series of seminars, followed by a seminar on cooperation with ESFRI and with the EU-funded project ResInfra EULAC.