The Challenge:
A communications provider needed to modernize a complex AWS environment spanning multiple organizations and two operational towers.
The existing setup relied heavily on manual processes, limiting scalability and increasing operational risk. The client also faced challenges in cost visibility, identity management across 90+ AWS accounts, and ensuring strong disaster recovery (DR) and high availability (HA) capabilities.
To support growth and improve efficiency, the organization needed to automate infrastructure, strengthen governance, enhance resilience, and gain better control over cloud spend—without disrupting ongoing operations.
The Solution:
Eliassen delivered a comprehensive cloud modernization strategy, combining architecture optimization, automation, and cost governance:
- Cloud Architecture Assessment & Optimization
Conducted a full discovery of the AWS environment and delivered recommendations to improve resilience, scalability, and cost efficiency
- Cost Visibility & Governance
Implemented AWS Cloud Intelligence dashboards (CUDOS, Cost Anomaly Detection, Trusted Advisor) and established budget controls across all accounts for improved financial oversight
- Automation & Infrastructure as Code (IaC)
- Automated AWS SSO management across 90+ accounts and 400+ permission sets, significantly reducing manual effort
- Migrated identity data into automated workflows with zero disruption to user access
- Implemented and enhanced Terraform and Pulumi solutions for scalable, repeatable infrastructure provisioning
- Built an end-to-end AWS Control Tower account provisioning solution, including Transit Gateway onboarding
- Resilience & Monitoring Enhancements
Developed a real-time AWS Health Dashboard with automated alerts, improving visibility and response times across environments
- Iterative Value Delivery
Delivered proof-of-concept solutions throughout the engagement to validate approach and maximize business impact
The Result:
- Delivered a high-availability, fault-tolerant cloud architecture with built-in multi-region redundancy
- Improved performance and latency for users across distributed locations
- Enabled scalable infrastructure capable of handling high-volume, peak-period workloads
- Significantly reduced manual effort and operational complexity through automation of identity and account management
- Enhanced cost transparency and governance, enabling more proactive cloud financial management
- Strengthened security and access control consistency across a large, multi-account AWS environment
Key Takeaway:
By modernizing cloud architecture and embedding automation at scale, Eliassen helped the client transform a complex, manual AWS environment into a resilient, efficient, and highly governed cloud platform—positioned for long-term growth.