Cloud Security Architecture & Operations is an advanced course designed to help professionals secure complex cloud environments through well-architected frameworks, monitoring, and operational best practices. The course begins with an in-depth look at cloud models (IaaS, PaaS, SaaS) and how security responsibilities vary across them. Learners examine the architectural layers of cloud platforms (AWS, Azure, GCP) and understand how to build security into network design, compute resources, identity management, and data storage. The course emphasizes secure design principles such as defense in depth, zero trust, and micro-segmentation. Learners build cloud-native architectures using services like AWS VPC, Azure NSGs, and GCP firewalls, incorporating IAM policies, MFA, resource tagging, and service control policies (SCPs). Operational practices include continuous monitoring, patch management, incident response planning, and disaster recovery strategies. Tools like AWS Config, Azure Security Center, and GCP Security Command Center are used for compliance checks, alerting, and posture management. Students also explore automation using Infrastructure-as-Code (IaC) with Terraform or CloudFormation for consistent and scalable policy enforcement. Real-world scenarios and architectural challenges help learners make trade-offs between security, performance, and cost. By course completion, learners will be equipped to design, implement, and operate secure cloud environments aligned with organizational risk and compliance requirements.