Aws 📚

A global data perimeter turns "who has access to what" from a per-account promise into an org-wide guarantee. This article walks through how I designed and rolled one out across a large multi-account AWS estate in a regulated banking environment — the architecture, the audit-mode-first rollout, and the exceptions that actually happened.

AWS has four distinct mechanisms to restrict permissions — and most engineers confuse them. This article breaks down SCPs, RCPs, Permission Boundaries and Session Policies: what each one limits, where it sits in the evaluation engine, and when to use which.

Transit gateways get the job done, but they come with real operational weight. I rebuilt the same infrastructure using Amazon VPC Lattice — here is what changed, what got simpler, and why it matters.

Dormant IAM credentials are not harmless — they are a ticking time bomb. I built IAM Cleanup, a serverless tool that automatically detects, tags, and removes unused IAM roles and policies before they become a liability.

Three fundamental misconceptions about AWS security that create dangerous blind spots in your security posture.