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Establishing a public cloud infrastructure for financial services can present a variety of difficulties relating to security, compliance, and operational consistency. This case study highlights how the enterprise-wide migration of a large private equity firm to the Microsoft Azure cloud resulted in significant architectural fragmentation and operational risk due to manual deployments being performed in a decentralized fashion. As the lead cloud architect, I designed and developed a unified enterprise landing zone architecture that would provide standardized infrastructure patterns for all users, automate the deployment of those patterns using Infrastructure as Code (IaC) technologies, and build resilience into the architecture by implementing failover mechanisms for mission-critical applications. The approach used to implement this solution was to leverage the principles described in Microsoft’s Cloud Adoption Framework (CAF) and built enterprise-scale architecture using the Bicep and Terraform automation technologies to create a consistent, repeatable, secure and compliant way to deploy the infrastructure pattern. After rollout, we removed manual configuration errors, reduced the time required to set up an environment from weeks to minutes, achieved 99.99% uptime for Tier-1 applications through multi-region failover patterns, and established a governed cloud foundation that would support the firm’s strategic efforts for analytics and AI. This case study showcases how adopting architectural standardization and automation can create a common, scalable, enterprise-grade platform for the entire organization while simultaneously satisfying the necessary security and resiliency requirements of the financial services industry