This document describes the work undertaken by Task 7.1 "Joint Access to Data and HPC Services" within the EUDAT2020 project focusing on the definition of synergies with other EU e-infrastructures and mostly on the interoperability achieved between EUDAT and PRACE. The main objective of this conducted work was to realize cross-infrastructure services that enable the required seamless access to a combined infrastructure offering in pairing the available data and high-performance computing resources.