Perfect prevention is a myth. As adversaries grow more sophisticated and attack surfaces expand across cloud, IT, and OT environments, the question is no longer if an organisation will be breached, but when—and how well it will withstand the impact. This panel moves the conversation beyond perimeter defences toward an "assume breach" mindset, where resilience is designed into people, processes, and technology from the start. Panellists will share a practical framework for operating under the assumption that attackers are already inside: continuous monitoring, zero-trust architectures, network segmentation, rapid detection and response, and rehearsed recovery plans. The discussion will explore how leaders can shift organisational culture, invest wisely, and build the muscle memory needed to contain incidents before they become crises. Attendees will leave with actionable strategies for turning inevitable compromise into managed, survivable events.