Sena Yeo

A high-security, mission-critical public sector network infrastructure required continuous operational engineering and precise hardware lifecycle management under stringent sovereign data privacy frameworks, where any routing failure would directly impact public governance systems.

Executed high-availability operational management across core enterprise data centre spaces under strict national security clearance constraints (G50 compliance equivalents). Maintained multi-tier hardware architectures including Cisco Nexus N9K and N7K platforms, engineered fault-tolerant HA redundant network links, and adhered to rigorous change-management frameworks for firmware audits and routing remediation without system degradation.

Achieved 100% operational baseline uptime across all assigned data centre zones, completely eliminating unscheduled routing isolation incidents for the sovereign enterprise environment.

A multinational aerospace enterprise required continuous, secure data routing back to centralised European headquarters across highly regulated international perimeters, while maintaining strict compliance with regional cross-border data privacy regulations and managing severe latency for a global workforce of 1,000+ active endpoints and VDIs.

Operated as sole regional APAC infrastructure anchor coordinating global handovers. Managed a cross-border Star Topology WAN using cloud-managed SD-WAN gateways. Engineered routing rulesets to satisfy mainland China data compliance frameworks. Deployed cloud-hosted IaaS identity nodes to mitigate distance-induced latency. Governed traffic compliance and secure connectivity for 1,000+ active endpoints and VDIs accessing the central data hub.

Eliminated cross-border data isolation, guaranteed absolute compliance with international data tracking regulations, and maintained 100% operational continuity during global follow-the-sun shift handovers.

High-availability statutory transport frameworks, national utility grids, and public sector network perimeters required strict system-level hardening, continuous preventative maintenance on Smart City IoT sensor arrays, and advanced security event monitoring to safeguard public infrastructure against emerging threat vectors.

Deployed across high-stakes CNI environments delivering critical security projects for public transport and utility statutory boards. Engineered Smart City IoT infrastructure monitoring. Directed NGFW deployments for a critical national water utility. Leveraged IBM QRadar SIEM for SecOps event triage. Led VAPT remediation cycles with follow-up firmware patching and protocol deprecation. Automated RHEL hardening via custom Bash scripting. Acted as Tier-2 escalation anchor using Wireshark and Tcpdump for deep packet-level root-cause analysis.

Secured critical public utility perimeters, closed structural VAPT gaps, stabilised high-throughput IoT telemetry lines, and maintained 100% operational compliance across audit-heavy government infrastructure environments.