3rd Line Network & Security Specialist - 24x7 Shift
We are seeking an experienced 3rd Line Network & Security Specialist to join a 24x7 operational support environment. This role is responsible for maintaining the availability, performance and security of complex network infrastructure, while providing expert-level technical support for escalated incidents and service requests. You will work as part of a shift-based team, responding to critical events, reducing service disruption and ensuring that issues are resolved efficiently and professionally.
Key responsibilities will include monitoring and troubleshooting LAN, WAN, data centre and cloud connectivity, as well as supporting firewalls, VPNs, routing, switching, load balancers and other network security technologies. You will investigate and resolve complex incidents, perform root-cause analysis, implement approved changes and contribute to problem-management activities. The role will also involve security event investigation, access control, vulnerability remediation and collaboration with infrastructure, engineering and service management teams. Accurate documentation, technical reporting and the maintenance of operational procedures will be essential. You may also support infrastructure upgrades, resilience testing, disaster recovery exercises and the introduction of new technologies.
The successful candidate will have substantial experience in a senior network operations or network security support role, ideally within a large, high-availability environment. Strong knowledge of TCP/IP, DNS, DHCP, BGP, OSPF, VLANs, VPNs, firewalls and network monitoring tools is required. Experience with technologies from leading networking and security vendors, together with familiarity with cloud networking, automation or scripting, would be advantageous. Relevant professional certifications such as CCNP, PCNSE, Fortinet, Check Point or equivalent are desirable. You should be analytical, calm under pressure and able to communicate clearly with technical and non-technical stakeholders. This position requires flexibility to work rotating shifts, including nights, weekends and public holidays, as part of a 24x7 support rota.
3rd Line Network & Security Specialist - 24x7 Shift
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