The aim of Satcom Pooling and Sharing is to create a unified solution that seamlessly provides the available services to different end-users in different security domains and regions. In this context, the PSS project shall : i) provide a preliminary functional design of an initial Secure Satcom Pooling Sharing System for global markets to be deployed by 2021, and ii) identify key technology enablers and required RD that would evolve the system in the 2021-2027 time-frame, paving the way for interoperability with other systems performing pooling and sharing of national assets. The study shall support ESA, in its specification of a possible future system, that would be operator/service provider-neutral, able to satisfy a global secure market (including specific European and EU needs) by 2020/2021 and beyond.