Our Singapore cloud methodology addresses MAS compliance, GCC requirements, and ASEAN multi-region architecture. Cloud strategy and assessment: understanding regulatory context (MAS-regulated, government, data classifications), current infrastructure, application portfolio, and business objectives. For MAS-regulated entities: Cloud Adoption Checklist mapping every MAS TRM requirement to specific architecture decisions. Cloud architecture design: multi-account structure with separate accounts for production, staging, development, shared services, security, and sandbox. Networking: Transit Gateway connecting all accounts with centralised inspection through Network Firewall/WAF. Identity: federated from corporate IdP with no shared credentials and principle of least privilege. Encryption: AES-256 at rest using KMS with customer-managed keys, TLS 1.3 in transit — enforced at the landing zone level. Compliance as code: AWS Config rules enforcing MAS TRM requirements — non-compliant resources automatically flagged and remediated. Infrastructure as Code: all infrastructure in Terraform, version-controlled, peer-reviewed, deployed through CI/CD. Drift detection: automated comparison between IaC definition and actual state. Multi-region ASEAN architecture: Singapore as primary with ASEAN expansion. Singapore (ap-southeast-1) for primary production. Jakarta (ap-southeast-3) for Indonesian workloads requiring data localisation. Regional DR: Singapore to Jakarta or Mumbai for cross-region disaster recovery. Country-specific lightweight deployments for latency-sensitive workloads connected to Singapore hub. Data sovereignty routing built into infrastructure — the same application handling multi-country users with data automatically processed in the correct jurisdiction. Cloud migration execution: systematic migration using the 7Rs framework (Retire, Retain, Rehost, Replatform, Refactor, Repurchase, Relocate). Applications grouped into waves of 5-10, prioritised by business value and complexity. Each wave following provision → migrate → deploy → test → cut-over → decommission. Post-migration optimisation: right-sizing, reserved instances (30-40% discount for stable workloads), spot instances (60-80% discount for batch processing), and storage tiering.