AWS Control Tower & Multi-Cloud Platform Modernization
Job Summary
Industry:
Platform & Cloud Infra
Service Provided:
Cloud Platform Implementation
Service Type:
Modernization
Core Services:
Cloud Infrastructure
Social share:
Project overview
As the organization expanded its cloud footprint, managing multiple AWS accounts became increasingly difficult. Accounts had been provisioned manually over time, resulting in inconsistent configurations, outdated networking structures, and operational complexity across environments.
The company also needed stronger governance, centralized logging, and a scalable multi-cloud networking strategy to support future growth and integration with Azure and Google Cloud Platform (GCP).
To modernize its cloud foundation, we implemented a new AWS Control Tower landing zone, redesigned the network architecture, and established a secure multi-account environment aligned with AWS best practices.
Challenges
The existing AWS environment had grown organically over several years, creating a number of operational and architectural issues.
Different AWS accounts were configured inconsistently, with varying security settings, networking structures, and governance policies. Since provisioning was handled manually, configuration drift became difficult to control and compliance management required significant operational effort.
Networking was another major challenge. Existing CIDR allocations had become fragmented over time, causing overlap issues and limiting the ability to scale or integrate additional environments cleanly.
The organization also lacked centralized visibility into logs, monitoring, and security events across accounts. Troubleshooting incidents or performing compliance reviews required navigating multiple isolated environments.
At the same time, the company was expanding into a multi-cloud architecture involving AWS, Azure, and GCP. Existing networking approaches were not designed to support secure and scalable cross-cloud connectivity.
The organization needed a modern cloud operating model that could support future growth while reducing operational overhead and improving governance.
Solution
We designed and implemented a centralized AWS Control Tower environment that established a scalable and secure multi-account cloud foundation.
The project included AWS account modernization, networking redesign, centralized governance, and multi-cloud connectivity implementation.
AWS Control Tower Landing Zone
We deployed a new AWS Control Tower landing zone based on AWS Well-Architected principles.
The implementation included:
- Standardized multi-account structure
- Automated account provisioning using Account Factory
- Organizational guardrails for governance and compliance
- Standardized security baselines and tagging policies
- Centralized identity and access management controls
This provided the organization with a consistent and repeatable account management framework for future growth.
AWS Account Migration & Network Redesign
To address network conflicts and scalability limitations, we designed a completely new VPC and CIDR allocation strategy.
The migration included:
- Provisioning newly structured AWS accounts
- Redesigning VPC and subnet architectures
- Migrating workloads with minimal service disruption
- Implementing cross-account connectivity using AWS Transit Gateway
- Establishing standardized network segmentation and routing policies
The updated network structure eliminated previous CIDR conflicts and improved long-term scalability.
Centralized Logging & Monitoring
We implemented centralized logging and monitoring capabilities across the AWS organization.
This included:
- Dedicated logging accounts
- Centralized CloudTrail and CloudWatch aggregation
- Organization-wide S3 log storage
- Standardized logging policies for all accounts
- Real-time monitoring dashboards and alerting
The new logging architecture improved operational visibility, audit readiness, and incident investigation capabilities.
Shared Network Services & Security
A dedicated network services account was created to host shared infrastructure components and security services.
Key implementations included:
- AWS Transit Gateway deployment
- Centralized firewall and network security tooling
- Shared routing and connectivity services
- Privileged Access Management (PAM) integration
- Standardized cross-account access policies
This simplified network operations while strengthening security controls across environments.
Multi-Cloud Connectivity with Megaport
To support hybrid and multi-cloud workloads, we designed and configured secure connectivity between AWS, Azure, and GCP using Megaport.
The implementation enabled:
- Secure private connectivity across cloud providers
- Centralized routing and IP management
- Improved latency and network reliability
- Scalable architecture for future hybrid cloud expansion
The multi-cloud network design provided a more consistent and manageable cross-cloud communication model.
Governance & Compliance Automation
We automated governance and compliance controls across the organization using AWS-native security services and Control Tower guardrails.
This included:
- AWS Config rule enforcement
- Security Hub integration
- Automated compliance monitoring
- Standardized IAM and SSO configuration
- Real-time governance dashboards
Results
The new cloud platform significantly improved how the organization manages and scales its cloud infrastructure.
Provisioning new AWS accounts became fully standardized and automated, reducing setup time from days to minutes while eliminating configuration inconsistencies.
The redesigned network architecture resolved previous CIDR conflicts and created a cleaner foundation for future expansion.
Key outcomes included:
- Faster and standardized AWS account provisioning
- Improved governance and compliance across all environments
- Centralized logging and monitoring for better operational visibility
- Reduced operational overhead from manual account management
- Stronger security posture with shared security controls and PAM integration
- Scalable multi-account architecture aligned with AWS best practices
- Secure multi-cloud connectivity between AWS, Azure, and GCP
- Improved network scalability and routing management
The AWS Control Tower implementation established a modern cloud operating model that enables the organization to scale more efficiently while maintaining strong governance, security, and operational consistency across its cloud ecosystem.
