The interrelationships between critical infrastructures (CIs) have become more complex, rendering the security and resilience management of cyber-physical attacks and natural hazard threats more challenging. The EU-funded PRECINCT project connects private and public CI stakeholders in a geographical area to a common cyber-physical security management method that will produce a protected territory for citizens and CIs. The project delivers a framework specification for systematic CI security and resilience management, a cross-facility collaborative management infrastructure enabling stakeholder communities to create PRECINCT ecosystems and increased resilience support services through PRECINCT blueprints, a vulnerability assessment tool using Serious Games and PRECINCT’s Digital Twins. PRECINCT Ecosystem will be deployed and tested in four large-scale living labs and three transferability validation demonstrators. This paper reports on the framework deployed in the Athens Living Lab pilot study and the findings concerning the user experience evaluation aspects of the PRECINCT framework conducted with intended end users.