Powering a SIEM Transformation for a Global Banking Platform

Executive Summary: A Seamless SIEM Shift, At Scale 

A global provider of digital banking and lending solutions made the strategic decision to replace its legacy SIEM, aiming to gain stronger performance, broader visibility, and a scalable foundation for security operations. UltraViolet Cyber was engaged as the trusted implementation partner, executing a complex migration from the incumbent platform to SentinelOne’s AI-powered SIEM. 

The environment included over 70 terabytes of daily data ingestion and more than 4,000 pieces of custom content spanning security, infrastructure, development, and fraud use cases—making the transition both technically demanding and operationally critical. 

UltraViolet Cyber delivered the project end-to-end. Using a phased, structured methodology, UltraViolet Cyber experts ensured operational continuity was maintained, optimized detection logic, and trained stakeholders across the organization. The outcome: a modern, efficient SIEM built to scale.  

Customer Context 

As a global digital banking and lending technology provider, the Customer serves financial institutions, fintechs, and alternative lenders across the U.S. and international markets. With approximately 2,500 employees, the organization operates a complex, technology-forward infrastructure with demanding operational and security requirements.  

The Customer’s previous SIEM platform played a critical role not just for the cybersecurity team, but across multiple business units. Engineering, infrastructure, development, and fraud teams all relied on the platform for real-time monitoring, analytics, and operational reporting.  

The Drivers Behind a Strategic Security Pivot 

The Customer initiated the migration to address both strategic and operational gaps in their legacy SIEM deployment. As log volumes approached 70 terabytes per day, existing licensing model became increasingly cost-prohibitive, especially as new data sources and use cases emerged across the business. They needed a solution that could scale without imposing financial constraints, and a Security Partner with the expertise to execute a complex, high-stakes transition successfully. 

Security teams encountered ongoing friction due to the previous platform’s lack of purpose-built tools for incident detection, triage, and response. Although they had developed custom workflows to compensate, the lack of centralized visibility led to operational inefficiencies and critical blind spots. While SentinelOne’s AI-powered SIEM provided a solid technical foundation, unlocking its full potential required a structured and strategic approach. UltraViolet was brought in to lead this transformation, ensuring the new SIEM was optimized and delivering value from day one.  

Key goals included: 

• Reducing SIEM-related licensing and infrastructure costs 
• Centralizing alerting and response workflows across the enterprise 
• Streamlining and optimizing legacy content for performance and clarity 
• Supporting cross-functional teams with a modern, scalable analytics platform 

Delivery Approach and Methodology: UltraViolet Cyber’s No-Disruption Migration Framework 

Through its Strategic Technical Alliance with SentinelOne, UltraViolet was selected to lead the migration based on deep experience executing complex SIEM transitions across platforms and industries. UltraViolet Cyber applies a structured, proven migration methodology—refined through real-world experience in high-volume, high-stakes environments—and tailors it to the unique needs of each customer and technology stack. In this case, the UltraViolet Cyber team partnered closely with SentinelOne to ensure a seamless customer experience, maintaining trust and continuity from initial planning through final cutover. 

The project unfolded across a 4-phased framework: 

Throughout the engagement, UltraViolet remained adaptive, scaling engineering resources, adjusting to emerging priorities and maintaining momentum without compromising quality. 

All In, Built to Scale with SentinelOne 

UltraViolet was chosen as a strategic partner to lead this SIEM migration, bringing deep expertise in large-scale SIEM transitions and specific experience with the SentinelOne platform. The UltraViolet team was tasked to lead and execute the end-to-end transition—applying a proven methodology, technical precision, and close collaboration to ensure success at scale. The team rapidly scaled to meet evolving demands, and this agility, combined with executional excellence, reinforced the organization’s value as a delivery partner and deepened trust between both organizations.  

UltraViolet SIEM Migration Service includes: 

• Senior engineers trained specifically in the SentinelOne SIEM ecosystem 
• Direct support for client onboarding, stakeholder management, and technical execution 
• Co-development of migration best practices and enablement frameworks 
• Post-migration Managed Detection and Response (MDR) Services including 24x7 coverage, Threat intelligence and Detection Engineering, and Hypothesis-Based Threat Hunting 

With the new platform fully operational, the Customer is now positioned to scale security visibility and analytics across its global operations, without the limitations that held them back on their previous SIEM.