BankSecure modernized 200+ legacy on-premise banking servers (running Windows Server 2008/2012) by migrating to a secure hybrid cloud architecture. Core banking apps moved to Azure Virtual Machines with auto-scaling. Non-critical workloads (HR, email, backups) migrated to AWS. Implemented Infrastructure-as-Code (IaC) using Terraform for consistent, auditable deployments. Set up Azure Site Recovery for DR failover. Monitoring via Splunk + Azure Monitor with real-time alerting. Legacy apps wrapped in containers for compatibility. Zero-downtime cutover during weekend maintenance windows.