Defence organizations, including the UK Ministry of Defence (MoD), face challenges from disjointed security tools and siloed data that lead to inefficiencies and increased costs, while also managing threats from cyber attacks. Elastic Security offers a unified platform using AI-driven Security Information and Event Management (SIEM) to streamline threat detection, reduce false positives, and cut incident response times, resulting in significant cost savings. The data mesh approach by Elastic helps break down data silos without compromising security, enhancing interoperability and maintaining necessary access controls. This strategy supports the MoD's Defence Data Strategy by enabling cross-domain investigations and reducing storage costs, ultimately improving operational resilience. Elastic's technology facilitates integrating multiple cloud environments securely, allowing defence agencies to optimize costs while maintaining strict security standards. Additionally, the platform's AI capabilities reduce administrative burdens by automating compliance processes, supporting the Digital MOD.UK's mission to unify security standards. Overall, Elastic's solutions promise a reduction in the total cost of ownership and improved efficiency, which are critical for modernizing and securing defence operations.