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Client Engagement Healthcare / Research

Modernizing a Multi-Account AWS Data Platform

How Tech Stack Playbook re-architected a fragmented AWS environment into a governed, secure, and scalable cloud data platform for a global healthcare enterprise.

Multi-Account
AWS Estate
Terraform
IaC Foundation
12–24mo
Modernization Roadmap
Automated
CI/CD Pipelines
Executive Summary

Overview

Tech Stack Playbook was engaged by a multinational health research and advocacy organization to assess and modernize a multi-account AWS data platform supporting enterprise research, analytics, and partner data exchange.

The environment had grown organically — resulting in inconsistent infrastructure standards, fragmented governance, and limited operational visibility. Our mandate was to establish a secure, governed, and automated cloud foundation that could scale with the enterprise's data operations.

The Challenge

Inherited Complexity

The organization was operating a multi-account AWS environment built across several earlier phases. While functional, the platform carried the hallmarks of organically grown enterprise cloud estates.

  • Fragmented infrastructure patterns across accounts with no unified IaC foundation
  • Limited deployment standardization leading to manual, error-prone changes
  • Inconsistent IAM and secrets management creating compounding security risk
  • Multiple inbound data connectors feeding siloed destinations with unclear lineage
  • No programmatic inventory or source of truth for AWS resources across accounts
  • Must stabilize existing operations while simultaneously charting a modernization path
What We Delivered

Cloud Foundation & Modernization

The engagement produced a modernized AWS foundation, automated pipelines, hardened security, and architectural direction for the enterprise data platform.

01
Multi-Account Foundation
Refined operating model with clear environment separation, standardized baselines, and governed workload onboarding.
02
Terraform & Terragrunt IaC
Reusable module library, DRY configuration, and version-controlled infrastructure with peer-reviewed change management.
03
GitHub Actions CI/CD
Automated plan/apply workflows with policy gates, federated auth, and environment-scoped secrets management.
04
IAM & Security Hardening
Hardened role/policy patterns, eliminated long-lived credentials, modernized secrets handling and trust boundaries.
05
Data Platform Architecture
Scalable ingestion architecture with landing zone patterns, connector onboarding strategy, and governed data domains.
06
Custom Python Tooling
Reusable utilities for AWS environment inventory and drift detection — durable tooling beyond the engagement.
Key Insight
This was not a greenfield rebuild or a one-time cleanup — it was the disciplined work of inheriting complexity, establishing governance, and creating a durable foundation for long-term platform growth.
Results

Outcomes & Business Impact

Repeatable Infrastructure Changes are version-controlled, peer-reviewed, and automated end-to-end.
Stronger Security Federated auth and modernized secrets management reduce credential risk across the estate.
Scalable Data Onboarding New connectors and sources onboarded against a consistent, documented pattern.
12–24 Month Roadmap Phased modernization plan giving leadership confidence in platform investment.
Technical Stack

Technologies Used

AWS Multi-Account Terraform Terragrunt GitHub Actions IAM Hardening Secrets Manager Python Data Landing Zones