Securing and observing infrastructure beyond imagination across Google and Microsoft requires a paradigm shift. This session details our Zero Trust approach to observability across a massive multi-cloud environment supporting diverse services (OTT, broadband, health, telecom, gaming, farming, AI like Gemini, Copilot, ChatGPT). Learn how we integrate security at every layer (entry, infra, data, AI) using tools like Dragonfly, Kong, Sentry, SonarQube, Kafka, Harbor, OPA, and Dynatrace. Discover strategies for secure instrumentation, threat detection within observability data, confidential computing insights, and managing vulnerabilities in our hyper-scale Kubernetes landscape (AKS, EKS, GKE). Gain practical insights into building observable security for the most demanding cloud-native environments.