Building a Resilient Azure Landing Zone for a Professional Services Firm

Background

Many growing businesses reach a point where their Azure environment — often built up organically over time — starts to work against them. Inconsistent naming conventions, no subscription hierarchy, and ad-hoc access permissions create security risk and operational overhead.

This post walks through the principles behind an enterprise landing zone and why getting the foundation right saves significant cost and effort later.

Key Design Decisions

• Management group hierarchy aligned to business units
• Centralised networking hub with spoke subscription topology
• Azure Policy applied at management group level for compliance enforcement
• Privileged Identity Management (PIM) for all privileged roles — no standing access
• Terraform modules for repeatable, auditable infrastructure deployment

Outcomes

The resulting environment provides a secure, governed foundation that the business can grow into. New workloads are deployed into pre-configured spokes with known security baselines, dramatically reducing the time from idea to production.