Cloud Security · Client: Global Manufacturing Conglomerate

Enterprise Azure Landing Zone & Zero-Trust Security Architecture

Designed and deployed a scalable Azure Landing Zone (ALZ) utilizing Terraform to enforce a strict Zero-Trust security perimeter across 40+ global subsidiaries.

Challenge

A massive global manufacturing conglomerate had grown rapidly through over 40 acquisitions. Each subsidiary brought its own fragmented IT infrastructure, shadow IT subscriptions, and disparate security standards into Azure. The result was a chaotic sprawl of over 300 disconnected Azure subscriptions. This lack of centralized governance caused critical ISO27001 compliance failures, wide open network perimeters (with RDP/SSH exposed directly to the internet), and an uncontrollable operational expenditure that was bleeding $2.1M annually in redundant ExpressRoute connections and oversized idle VMs.

Solution

We executed a comprehensive cloud consolidation strategy by architecting a unified Azure Landing Zone (ALZ) framework entirely represented as code (Infrastructure as Code) using Terraform. 1. **Hub-and-Spoke Centralization**: Deployed a highly available Hub VNet to centralize egress internet traffic through Azure Firewall Premium and consolidate hybrid connectivity via a single ExpressRoute gateway. All 300+ subsidiary subscriptions were migrated to spoke VNets peering exclusively to the Hub. 2. **Governance at Scale**: Deployed Azure Management Groups aligned to the business hierarchy. Assigned over 150 custom Azure Policy definitions at the root level to automatically remediate non-compliant resources (e.g., auto-enabling encryption, preventing public IP creation). 3. **Identity Modernization**: Transitioned from fragmented Active Directory forests to a unified Microsoft Entra ID model, enforcing Phishing-Resistant MFA and Just-In-Time (JIT) access via Privileged Identity Management (PIM).

Impact

The architectural overhaul successfully brought the entire conglomerate under a single pane of glass for security and billing. The automated Terraform ALZ reduced new subscription provisioning time from 3 weeks to under 15 minutes. By eliminating redundant network gateways and terminating shadow IT resources flagged by Azure Policy, the client achieved a documented $2.1M in annualized cloud savings. Most importantly, the environment passed its next ISO27001 audit with zero major non-conformities.