CIO Brief: Governance at Scale — Why Control Tower Matters
Retrospective: this article looks back at events from June 2019, written in 2026 with the benefit of hindsight.
The short version: AWS Control Tower, released in 2019, sets up your AWS cloud as a well-organized group of accounts with security rules built in. It is the difference between building a house with a blueprint and adding rooms wherever there's space.
Why governance at scale matters
As teams grow, so do AWS accounts, resources and people with access. Without central rules, each team configures security its own way. Mistakes multiply, audits become painful, and nobody can answer simple questions like "are all our storage buckets private?"
The business impact
- Fewer misconfigurations, because risky actions are blocked automatically.
- Faster audits, with consistent controls and central logs.
- Faster delivery, because new accounts start compliant instead of needing review.
Questions to ask your team
- How do we create new AWS accounts, and do they automatically get our security baseline?
- Which risky actions are blocked in every account, not just discouraged?
- Are all logs centralized somewhere attackers and administrators can't easily delete them?
What good looks like
A governed landing zone with central identity, central logging, preventive and detective rules, and an automated process for creating new accounts.
The decision
If AWS accounts are created manually or inconsistently, fund a Control Tower adoption project. It typically pays for itself in reduced audit and remediation effort.
- AWS Control Tower Goes GA (June 2019): Guardrails for Multi-Account AWS Platform Changes
- How to Set Up AWS Control Tower With Preventive and Detective Guardrails How-To & Hardening
- Control Tower Guardrail Selection Checklist How-To & Hardening