Tenable is a cyber exposure company that helps over 23,000 organizations manage their attack surfaces and minimize cyber risks through innovative tools like Nessus and Tenable.io. The document discusses the evolving challenges of securing dynamic IT environments, including cloud services and IoT devices, and emphasizes the importance of a collaborative approach among IT and security teams. It offers insights and best practices from various experts on embedding security throughout the lifecycle of technology deployments to address modern vulnerabilities.