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Case Study
AWS Control Tower Implementation and Cloud Deployment Optimization
About the Client
A company transitioning from on-premise deployments to cloud-based solutions on AWS. The client needed to establish a structured, manageable multi-account cloud environment to support new customer onboarding and facilitate existing customer migration to the cloud.
Challenge
The client faced significant operational challenges in their manual AWS deployment The client faced significant operational challenges with their manual AWS deployment processes and lacked proper multi-account governance. Their existing deployment methodology relied on manual AWS account creation processes and individual CloudFormation scripts for deploying 6-9 EC2 instances with associated components including security groups, subnets, and load balancers for each customer environment. Additionally, existing AWS accounts had pre-configured AWS Config resources that created enrollment conflicts when attempting to implement proper governance structures. The lack of standardized deployment processes and centralized account management hindered their ability to scale efficiently and maintain consistent security policies across customer deployments.
Key Results
Improved deployment consistency with standardized CloudFormation templates compatible with AWS Control Tower
Enhanced enterprise security posture by implementing centralized governance with Service Control Policies, mandatory resource tagging, and CIS AWS Benchmark compliance and SOC 2 compliance across all customer environments
Achieved improvement in deployment consistency across multiple customer environments
Solution
Implemented a comprehensive AWS Control Tower landing zone to establish centralized multi-account governance and management capabilities for the client's cloud infrastructure. The solution involved deploying AWS Control Tower with a configured management account and initial organizational units to provide structured account provisioning workflows.
● Multi-Account Strategy Implementation: Deployed AWS Control Tower landing zone to enable scalable multi-account architecture with proper organizational units and governance frameworks.
● Existing Account Integration: Developed and documented a staged enrollment approach for integrating existing AWS accounts with pre-configured AWS Config resources into AWS Control Tower, preserving historical compliance data while resolving resource conflicts.
● CloudFormation Optimization: Reviewed and optimized existing CloudFormation templates and CDK scripts for Control Tower compatibility, replacing manual shell scripts with standardized Infrastructure as Code templates.
● Security and Compliance Enhancement: Implemented a comprehensive compliance and monitoring framework aligned with the AWS CIS Benchmark by leveraging AWS Control Tower guardrails and AWS Config Conformance Packs. Additionally, developed and enforced custom Service Control Policies (SCPs) to mandate the use of a "Tenant Name" tag on all provisioned resources, enabling improved governance, cost allocation, and resource monitoring across the environment.
● Database Security Improvements: Implemented RDS database deployment with password management through AWS Secrets Manager to enhance security posture and eliminate hardcoded credentials.
Technologies Used
AWS Control Tower
AWS CloudFormation
AWS Config
AWS Organizations
AWS Secrets Manager
AWS CIS Benchmark Conformance Packs
AWS IAM (Identity and Access Management)
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