Network&SecuritySystemsEngineer

**Overview of the Role** The **Network & Security Systems Engineer** is a hands-on technical role responsible for the implementation, administration, troubleshooting, and operational support of enterprise network and security infrastructure across cloud, hybrid, and managed environments. This role acts as a Tier 2/3 escalation point for complex network, firewall, connectivity, and security incidents, ensuring reliable, secure, and high-performance connectivity across the organisation. **Responsibilities** : * Configure, administer, troubleshoot, and maintain enterprise network infrastructure across cloud and on-premise environments. * Operate and support firewalls, including policy management, VPNs, NAT, routing, and security rule troubleshooting. * Manage and troubleshoot Cloudflare services, including WARP, Zero Trust, Secure Web Gateway, DNS Security, and remote access services. * Implement and support SD-WAN, VPNs (IPSec / SSL), site-to-site connectivity, and secure remote access solutions. * Troubleshoot network connectivity issues including LAN/WAN, routing, switching, VLANs, DNS, DHCP, and performance-related incidents. * Act as a Tier 2/3 escalation point for complex network and security incidents from Service Desk, internal IT, and MSP support. * Perform root cause analysis (RCA) and implement remediation for recurring network and security issues. * Monitor and respond to security alerts, incidents, vulnerabilities, and threat intelligence events. * Perform firewall rule reviews, security policy tuning, and access control validation. * Support network segmentation, Zero Trust implementation, and secure access controls. * Assist with vulnerability remediation, security hardening, and risk mitigation activities. * Support Microsoft 365 security configuration including Defender for Office 365, Exchange Online Protection, and related security controls. * Collaborate with Platform Engineering, Security, and Service Delivery teams to resolve cross-domain incident