Description Towards an Open and Sustainable ICT Research Infrastructure Strategy Research infrastructures (RIs) are facilities, resources and related services used by the scientific community to conduct top-level research in their respective fields. European RIs are key instruments in bringing together a wide variety of stakeholders to look for solutions to problems facing society today. In the near future there will be large scale investments in improving and replacing European RIs. These future investments will be predominately oriented towards transnational RIs.The OSIRIS (Towards an Open and Sustainable ICT Research Infrastructure Strategy) consortium is composed of participants involving several and highly relevant Public Authorities and National Champions across 13 EU Members States and Associated Countries and regions with direct links to existing and future ICT European RIs (i.e. High Performance Computing, Grids, Networks, Micro/Nanoelectronics and Future Internet). Through its objectives, the OSIRIS project opens a novel initiative regarding the structure and management of European ICT RIs that will cover existing and crucial gaps related to the necessary dialogue between the main stakeholders of European ICT RIs. The mission of OSIRIS is the creation of a open and living working group that will analyse in a continuous process the relationship between present and future European ICT RIs, Public Authorities and National Champions facing present and future issues and thus aligns itself with the ESFRI roadmap and its intention to build European capacity within the context of European ICT RIs.