Critical infrastructure networks are geographically distributed systems spanning multiple scales. These networks are increasingly interconnected and dependent on each other for normal operation. Localised asset failures from natural (or intentional) hazards can propagate across multiple networks, greatly increasing the magnitude and spatial extents of disruptions – potentially affecting those far removed from an initiating failure event. This poster presents an overview of our integrated framework for quantifying and identifying systemic vulnerabilities across multiple connected national infrastructures with application to New Zealand.