How MUFG Standardized AWS Operations Across 100 Accounts with Borealis Solutions

Industry: Banking & Financial Services
Company Size: Global Enterprise
Region: North America & Global Operations

Introduction

Mitsubishi UFJ Financial Group (MUFG) is one of the world’s largest financial institutions, operating across continents with massive infrastructure demands. As the organization accelerated its cloud journey, their internal platform team faced a daunting challenge: enabling consistent, scalable, and secure AWS account governance across nearly 100 accounts.

They partnered with Borealis Solutions to bring order, automation, and velocity to their cloud operations.

The Challenge

Despite being an enterprise powerhouse, MUFG’s platform team was constrained by limited internal bandwidth. They were tasked with building out a multi-account AWS platform, but faced several core challenges:

• No centralized subnet, IP, or logging strategy

• Incomplete and inconsistent Terraform modules

• Complex integration requirements with Splunk and on-prem systems

• A critical need for rapid delivery, documentation, and long-term maintainability

Why MUFG Chose Borealis

MUFG needed a partner who could move fast while navigating complex enterprise environments. They chose Borealis because of our:

• Recognized AWS partnership and DevOps/Terraform expertise

• Proven ability to scale infrastructure across 80–100 AWS accounts

• Real-world experience in hybrid cloud and enterprise logging integration

• Thought leadership and documentation-first mindset

Our Approach

Over a five-month engagement, we worked shoulder-to-shoulder with MUFG’s cloud platform team to operationalize their vision and scale delivery:

1. Terraform Infrastructure Standardization

• Enhanced existing modules and introduced new reusable patterns

• Standardized deployments across all accounts using parameterized inputs

• Enforced tagging and naming conventions for governance and traceability

2. IP & Subnet Management

• Designed a scalable IP allocation strategy across all VPCs

• Automated subnet creation using Terraform modules

• Mapped address space efficiently for future growth

3. Enterprise-Grade Logging

• Built a centralized log ingestion pipeline with real-time streaming

• Integrated with Splunk across all AWS accounts

• Ensured audit and security logging requirements were met

4. Automation with Azure DevOps

• Deployed Terraform via robust CI/CD pipelines

• Implemented automated approvals, drift detection, and validation

• Delivered pipelines that scaled with ease across teams and environments

5. Documentation & Enablement

• Created detailed architecture diagrams and runbooks

• Delivered onboarding guides and operational playbooks

• Enabled internal teams to maintain, extend, and govern the platform

The Results

The partnership delivered tangible enterprise impact:

• ✅ Centralized log streaming across 100 AWS accounts

• ✅ Fully standardized Terraform module library

• ✅ Automated IP/subnet segmentation and VPC creation

• ✅ Robust Azure DevOps CI/CD pipelines for infrastructure

• ✅ Delivered ahead of schedule, exceeding expectations

“This collaboration exceeded our expectations. Your team brought deep cloud expertise and executed with velocity and precision.”
— Easton Wheatley, Director of Cloud Platforms, MUFG

What’s Next

With the foundation solidly in place, MUFG is planning:

• IAM and security automation at scale

• AI-enabled monitoring and automatic drift remediation

• Continuous maintenance and pipeline upgrades across the cloud estate