Case Study: From Legacy to Hybrid Cloud

THE CHALLENGE

Bridging the gap between old systems and new opportunities

As part of a major strategic acquisition, a leading telecom provider faced the complex task of consolidating and modernizing multiple legacy operational systems. Their billing platform, critical to supporting millions of customers, lacked the agility and scalability required for emerging cloud technologies. The company needed to unify disparate OSS/BSS systems, reduce latency, strengthen security, and lay the groundwork for automation—all while ensuring business continuity and customer satisfaction throughout the transition.

THE SOLUTION

Building a hybrid cloud engine for continuous innovation

TSG partnered closely with the client to design and implement a hybrid cloud-based Operational Support System (OSS) capable of evolving with the business. The team defined a future-ready architecture to support the entire software development lifecycle—from design through deployment—while embedding agile squads to accelerate migration and enable continuous improvement. By consolidating and migrating multiple on-premises systems into a hybrid cloud model, TSG created seamless interoperability between legacy and modern applications. The new OSS environment was engineered for scalability, supporting API-driven services, microservice-based flexibility, and automated provisioning to deliver faster, more reliable releases.