Network and Security Specialist
London (Moorgate) Onsite Permanent
VIQU have partnered with a global trading organisation looking to hire a Network and Security Specialist to take ownership of network and cyber security across a critical London-based environment. This is a hands‑on, technically led role where the Network and Security Specialist will be responsible for protecting systems, ensuring high availability, and strengthening security posture while supporting day‑to‑day operations and future growth.
Responsibilities
* Design, implement, and maintain secure network and security infrastructure to meet current and future business needs.
* Own the full network and security lifecycle, maintaining uptime close to 99.99%.
* Monitor, investigate, and respond to security incidents using SIEM tools, Sophos MDR, and threat‑hunting techniques.
* Configure and manage firewalls, VPNs, IDS/IPS, web and email security solutions.
* Maintain high patching and vulnerability remediation standards, including CVE management.
* Coordinate annual third‑party penetration testing and lead remediation based on risk and CVSS scoring.
* Investigate cyber incidents, perform forensic analysis, and implement rapid mitigation actions.
* Maintain and upgrade network switches, routers, and security devices.
* Define, maintain, and enforce security policies, disaster recovery plans, and contingency procedures.
* Create and maintain technical documentation and Jira tickets.
* Support infrastructure and service desk teams when required and actively upskill IT colleagues.
* Manage suppliers, carriers, SLAs, and assist with IT budget tracking and spend control.
Requirements
* Expert knowledge of Checkpoint firewalls, Cisco routers and switches, and Cisco ISE.
* Strong experience with Zscaler Internet Access, Zscaler Private Access, Splunk, and enterprise SIEM tooling.
* Proven background in network security, threat prevention, and incident response.
* Cisco CCNA and CCNP certifications.
* Experience with data centre colocation and vendor/carrier management.
* Strong PowerShell and scripting capabilities.
* Experience across Windows Server and Linux environments, Active Directory, Exchange (on‑prem), VMware, VxRail, Rubrik, and RecoverPoint.
* Excellent communication skills with a flexible, hands‑on approach and strong attention to detail.
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