Case Study

Multi-Account AWS Infrastructure Modernization with Terraform IaC

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Industry 

Software Development

Expertise 

AWS Control Tower, AWS Organizations, Amazon VPC

Offerings/solutions 

Implemented a secure, scalable AWS multi-account architecture

About the Client

The client is a US-headquartered company specializing in workforce management and enterprise solutions, empowering organizations to connect employees, processes, and technology for measurable business results.

Highlights

70%

Faster infrastructure provisioning

100%

Consistency in resource configs

90%

Reduction

The Challenge

Design and implement a secure multi-account AWS architecture across prod India, prod US, stage, dev, and test environments using Terraform, while ensuring consistent infrastructure provisioning, robust automation, centralized governance, minimal downtime, and smooth transitions between environments throughout the deployment lifecycle.

Solutions

• Designed a well-structured AWS multi-account setup aligned with AWS Control Tower best practices for better governance and isolation.
• Implemented Terraform to standardize, automate, and manage AWS resources across environments with reusable modules.
• Established a secure landing zone with dedicated accounts for security, logging, and workloads, ensuring compliance and scalability.
• Built a new Amazon VPC architecture in AWS India with public and private subnets, NAT gateways, and centralized routing for secure connectivity.
• Configured AWS IAM Identity Center (SSO), IAM roles, and policies for secure, role-based access following least-privilege principles.
• Planned and executed data migration (Amazon S3, Amazon RDS, etc.) from AWS US to AWS India with minimal downtime.
• Designed workloads for resilience and performance using Auto Scaling groups, Application Load Balancer, and Multi-AZ RDS.
• Deployed AWS WAF, Amazon GuardDuty, AWS Security Hub, and Amazon CloudTrail for proactive monitoring, auditing, and threat detection.
• Integrated Amazon CloudWatch, Amazon CloudTrail, and centralized log storage for observability and faster troubleshooting.

The Results

Reduced infrastructure provisioning time by 70%, achieved 100% configuration consistency across 5 AWS accounts, enforced least-privilege access, reducing unauthorized incidents by 90%, and decreased manual tasks by 60%.

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