Network And Security Specialist

Network and Security Specialist – London (Moorgate) – Onsite – Permanent – Competitive Salary

VIQU has partnered with a global trading organisation to hire a Network and Security Specialist who will take ownership of network and cyber security across a critical London-based environment. This is a hands‑on, technically led role where the Specialist will be responsible for protecting systems, ensuring high availability, and strengthening security posture while supporting day‑to‑day operations and future growth.

Key Responsibilities

• Design, implement, and maintain secure network and security infrastructure to meet current and future business needs.
• Own the full network and security life cycle, 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.

Key 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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