Overview
A rapidly growing financial institution partnered with SourceFuse to transform its AWS environment into a secure, compliant, and cost-efficient cloud foundation. As digital banking initiatives expanded, the organization needed stronger governance, improved cost visibility, and a scalable network architecture aligned with strict regulatory requirements.
SourceFuse delivered a comprehensive Cloud Infrastructure Managed Services (MSP) engagement, combining Cloud Security Posture Management (CSPM), FinOps-driven cost optimization, and enterprise-grade network modernization. The result was a future-ready AWS environment that supports growth while maintaining continuous regulatory compliance.
The Challenge
The organization’s rapid digital expansion led to “cloud sprawl,” resulting in several critical pain points:
- Security & Governance Gaps: Lack of continuous monitoring and manual compliance validation created significant audit risks.
- Cost Management Hurdles: Oversized instances and orphaned resources led to uncontrolled spending with no departmental accountability.
- Network Complexity: A "spaghetti" architecture of decentralized VPC peering and independently managed VPNs made troubleshooting difficult and limited scalability.
- Regulatory Pressure: The need to align with RBI guidelines and international standards (PCI DSS, CIS) required a more sophisticated, automated approach to cloud management.
The Solution
SourceFuse implemented a multi-pillar strategy to re-architect the institution’s cloud foundation:
1. Cloud Foundation & Governance Modernization
We consolidated standalone accounts into a unified AWS Organization using AWS Control Tower. This established a secure “Landing Zone” with dedicated accounts for Security, Logging, and Networking, scaling the environment from 6 to 53 accounts with automated guardrails.
2. Network Re-architecture
We migrated from point-to-point peering to a hub-and-spoke model using AWS Transit Gateway. This centralized all connectivity, including Direct Connect and VPNs, while implementing AWS Network Firewall for stateful traffic inspection across the entire organization.
3. Automated Security (CSPM)
Using AWS Security Hub and AWS Config, we established real-time governance. Automated remediation playbooks were built to fix misconfigurations instantly, ensuring continuous alignment with financial regulations.
4. FinOps & Cost Optimization
We applied rigorous FinOps principles, utilizing AWS Compute Optimizer for rightsizing and implementing Compute Savings Plans. Automated cleanup workflows were deployed to eliminate resource waste daily.
Results
- 99% Security Compliance: Elevated the compliance score from an initial 38% to 99%, meeting rigorous regulatory benchmarks.
- 30% Cost Reduction: Achieved sustainable savings on compute spend through automated rightsizing and waste elimination.
- Seamless Scalability: Successfully expanded to 53 well-governed accounts, supporting rapid application isolation and onboarding.
- Operational Resilience: Simplified network operations, reducing troubleshooting overhead and eliminating single points of failure.
- Audit Readiness: Centralized, immutable logging and real-time reporting ensured the bank is always prepared for regulatory inspections.
Technologies & AWS Services Used
- Security & Governance: AWS Security Hub, AWS GuardDuty, AWS Config, AWS CloudTrail
- Monitoring & Automation: Amazon CloudWatch, AWS Systems Manager
- Compute & Cost Optimization: AWS Compute Optimizer, Savings Plans
- Network Modernization: AWS Transit Gateway, AWS Network Firewall, AWS Direct Connect, AWS WAF
- General Infrastructure: Amazon S3, Amazon EC2, VPC, AWS IAM
