CenturyLink, the third-largest telecommunications company in the United States, has developed a robust network management framework using open-source technologies to handle its vast and evolving data needs. As the company expanded through mergers and acquisitions, it faced challenges in managing data from over 300,000 devices and generating over 1 million alerts daily. Initially relying on a basic network management system architecture, CenturyLink experienced frequent outages and database performance issues as their operations grew more complex. Transitioning to a Command Query Responsibility Segregation (CQRS) architecture and integrating Elasticsearch significantly improved query speeds and system scalability, reducing downtime and increasing operational efficiency. The adoption of Elasticsearch, along with other open-source tools like Redis and Kafka, facilitated seamless incorporation of new network management systems and devices. CenturyLink's Service Assurance team now aims to leverage the Elastic Stack to create a comprehensive framework that utilizes predictive algorithms and operationalizes diverse data types, including network utilization and weather, to produce actionable insights for better decision-making.