AWS Cross-Account Migration & Modernization

A controlled migration blueprint for moving a web platform between AWS accounts while making infrastructure, data, certificate, DNS, compute, and cutover dependencies explicit.

Anonymized architecture case study

Architecture diagram for an AWS cross-account migration and modernization — Architecture view with client and environment identifiers removed.

Case Study Overview

A web application spanning edge delivery, DNS, compute, certificates, object storage, and relational data needed to move from a source AWS account to a governed destination account with a clear sequence and rollback path.

Outcome

A migration design that exposes hidden dependencies early and supports phased execution, technical validation, rollback planning, and clearer stakeholder communication.

Architecture Approach

1Map source-to-destination dependencies before migration begins, including DNS, certificates, frontend assets, compute images, and relational data.
2Recreate the destination foundation with CloudFormation rather than relying on undocumented manual configuration.
3Use AWS Database Migration Service for the relational data path and an explicit image-transfer process for compute.
4Define validation and cutover checkpoints so traffic changes can be phased and reversed if required.

Role & Scope

Migration architecture, dependency mapping, and cutover planning

Technology Stack

AWS Migration

CloudFormation

AWS DMS

EC2

RDS

CloudFront

Route 53

ACM

AMI Transfer

Cutover Planning

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