Over the past decade, the security environment has undergone rapid transformation driven by climate change, geopolitical tensions, digitalization, energy transition, and AI integration. These shifts have created a new ?risk reality? where traditional crisis management is insufficient, making interdisciplinary approaches and critical infrastructure resilience essential. This volume addresses these challenges through seventeen chapters authored by experts across multiple fields. It explores key themes such as geopolitics of infrastructure, energy security, technological risks, cybersecurity, AI impacts, and organizational resilience. Case studies and analytical models provide insights into managing risks in sectors like energy, transport, finance, and water systems. The book emphasizes interconnected risks across physical, digital, and societal domains and highlights the need for integrated strategies. It offers valuable theoretical and practical guidance for policymakers, researchers, and practitioners, contributing to a deeper understanding of modern security challenges and resilience-building.