Ensuring system availability is critical for a CISO of a publicly traded company. I would put in place a multi-layered plan to protect against possible interruptions. The establishment of redundant data centers in geographically dispersed areas would guarantee failover capabilities in the event of regional outages or natural disasters. Using dependable cloud-based solutions with load balancing and high availability would strengthen our infrastructure even more. Strict access controls, frequent system updates, and patch management procedures would reduce security flaws and stop possible cyberattacks from jeopardizing system availability. Furthermore, prompt detection and remediation of any disruptions would be possible with ongoing monitoring via intrusion detection systems and proactive incident response plans, guaranteeing continuous business operations and preserving stakeholder confidence in our services.