Enterprise AWS Cloud Migration & Landing Zone

Lifting an entire hospital system's data center into the cloud is the easy part to say and the hard part to do safely. We built the governed landing zone, the guardrails, and the pipelines that made a sprawling on-prem estate land in AWS — secure, repeatable, and auditable from the first account.

AWSControl TowerInfrastructure as CodeCloudFormationCI/CDIAMKMSCloudWatchLambda

Industry

Healthcare / Enterprise

Scale

Large · Flagship program

Status

In production at enterprise scale

// Problem

The challenge

Migrating a large, regulated enterprise to the cloud fails when it's done account-by-account by hand: inconsistent security, drifting configuration, and no way to prove compliance. The organization needed a foundation — one that enforces policy automatically so hundreds of workloads can move without each becoming a bespoke security review.

// Solution

What we built

A Control Tower–based multi-account landing zone with security, identity, and observability delivered as code to every account from the moment it's created.

AWS Control Tower landing zones with a CI/CD pipeline that rolls out service control policies, IAM users/groups/roles, KMS keys, Config rules, and SSM/CloudWatch baselines automatically
Everything defined as infrastructure-as-code (CloudFormation) and version-controlled — no click-ops, full audit trail
Lambda-driven automation for guardrail remediation and routine operational tasks
A repeatable account-vending and workload-onboarding process so new teams inherit compliance by default
Cost visibility and right-sizing baked into the baseline to keep the migration economically honest

// Architecture

How it works

A management/organization account governs a tree of workload accounts, each receiving its security baseline through the pipeline rather than by hand. Config rules continuously evaluate posture; drift and violations trigger automated remediation. Because the baseline is code, the entire control environment can be reproduced — which is exactly what makes the next item, disaster recovery, possible.

// Outcome

Results

Physical and virtual on-prem systems migrated onto a consistently governed cloud foundation
Security and compliance configuration applied uniformly to every account — provable, not aspirational
New workloads onboarded in a fraction of the previous time, with guardrails inherited automatically
Identified and captured significant ongoing cost savings versus the legacy estate

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