AWS Multi-Account Governance
An AWS Control Tower alternative utilizing AWS Organizations, SCPs, and centralized logging for a secure multi-account strategy.
Architecture Topology
Root Org (Payer)
Figure 1.0: Conceptual Architecture Blueprint
1. What problem does this solve?
Using a single AWS account for multiple teams leads to severe security risks, API rate limiting, and impossible cost attribution.
Why is the traditional approach broken?
Enterprises often start with one massive AWS account using complex IAM resource policies to separate teams. A single compromised IAM credential with broad permissions can destroy the entire corporate infrastructure.
2. How does MacroCloud solve it?
MacroCloud provisions a strict AWS Organizations hierarchy. We isolate workloads into dedicated accounts (Production, Staging, Sandbox) and wrap them in Service Control Policies (SCPs) that act as impenetrable guardrails (e.g., blocking region changes, disabling CloudTrail deletion).
3. Implementation Phases
This architecture is deployed via infrastructure-as-code following this exact sequence:
4. Operational Considerations & Risks
Operations
- Managing AWS SSO (IAM Identity Center) mapping to corporate Active Directory
- Reviewing centralized GuardDuty findings
- Automating account vending machine pipelines
Risks
- Applying an SCP that inadvertently breaks a critical production deployment
- Root account compromise (requires hardware MFA locked in a physical safe)
Business Outcomes
- Complete blast radius isolation
- Perfect cost attribution per workload
- Automated security baselines for all new accounts
Core Components
- AWS Organizations
- Service Control Policies (SCPs)
- AWS IAM Identity Center
- Centralized CloudTrail Archive