Madison Sy

Results-driven Infrastructure and System Administration professional with over 10 years of experience managing, securing, and modernizing enterprise environments within the highly regulated banking and financial services sector. Proven track record in orchestrating large-scale Windows Server migrations, enforcing rigid security hardening frameworks, and ensuring strict compliance with BSP, PCI DSS, and internal audit mandates. Expert in access management lifecycle, disaster recovery, and data center operations.

Seeking a senior infrastructure or engineering role to scale operational resilience and infrastructure security.

System Admin Officer - Maybank Philippines Inc.

(2025-05)

• Infrastructure Modernization: Successfully led and executed the end-to-end enterprise OS migration from Windows Server 2016 to 2022 across production and test environments, ensuring zero operational downtime.
• Security & Hardening: Designed and enforced strict server hardening protocols to minimize vulnerability surfaces, aligning the entire Windows infrastructure with global banking security standards.
• Storage Architecture: Architected, deployed, and managed a centralized enterprise file server integrated seamlessly with Active Directory, optimizing access controls for thousands of users.
• Compliance & Patching: Streamlined application patch management and updates via SCCM, maintaining 100% compliance with internal audits, BSP guidelines, and PCI DSS standards.

Access Management Officer - Maybank Philippines Inc.

(2022-11 - 2025-05)

• Identity Governance: Managed the end-to-end user identity lifecycle across critical enterprise applications, ensuring strict adherence to the principle of least privilege.
• Risk Mitigation: Designed and implemented comprehensive access matrices and Role-Based Access Controls (RBAC), reducing unauthorized access risks and streamlining audit readiness.
• Endpoint Management: Deployed critical workstation patches and monitored corporate system settings to maintain an optimized endpoint security posture.

Data Center Operator - Maybank Philippines Inc.

(2015-02 - 2022-11)

• Core Banking Operations: Maintained 24/7 operational continuity of core IBM AS/400 systems, executing critical daily batch operations and system backups.
• Financial Switching: Managed daily ATM and Bancnet financial network cut-offs with zero transaction loss, ensuring seamless reconciliation cycles.
• Technical Support: Provided Tier-2/3 technical infrastructure support and environment setups to resolve critical system incidents.

Bachelor of Science - Information Technology - Occidental Mindoro State College (2010 - 2014)