This deliverable constitutes a report on the 5G-EPICENTRE Portal, a web-based user interface provided for the booking and reservation of testbed facilities’ resources for experimentation. In addition, it delivers on workflows designed for network function developers to remotely provide their executable code to the 5G-EPICENTRE federated testbed sites, thus making them available for further experimentation and rapid prototyping. In this deliverable we provide a high-level overview of the different workflows and processes involved in experimentation for PPDR developers, and identify the key actors that will interact with the 5G-EPICENTRE platform. We present a robust and flexible solution for experiment preparation and network functions onboarding, informed by theend-users’ requirements and corresponding to the functional blocks and specifications listed in the 5G-EPICENTRE architecture (D1.3). Also, this deliverable describes an intuitive graphical user interface that has been designed for the simplification of the complex process of service function chaining toward rapidly establishing network services for connecting to network applications. We present implemented workflows with comprehensive narratives for each of the functionalities provisioned by the currently implemented version of the solution. The 5G-EPICENTRE Portal will hence be made available for accommodating the preliminary version of the 5G-EPICENTRE experimentation facility (MS4 – M18), and will be further enriched and updated with additional functionality (including the outcomes of Task 3.2 “Novelty experiment insights visualization tools”) until the end of the project implementation period (M30), through a continuous integration/continuous delivery approach.