Network Security Engineer (City of London)

Network & Security Engineer – Financial Services – £80k + Hybrid (Central London)

Permanent | Hybrid (2-3 days in Central London)

Our client, a leading player in the financial services sector, is seeking a skilled Network & Security Engineer to join their growing team. This is a permanent opportunity offering up to £80,000 , with hybrid working arrangements based in Central London .

Key Responsibilities

• Design, implement, and support robust network infrastructure across multiple global sites.
• Manage multicast routing for market data distribution across complex environments involving multiple VRFs and VLANs.
• Configure and maintain Aruba (Access/Distribution) and Arista (Core/Low-Latency) switches.
• Support BGP peering, route filtering, and optimisation for ultra-low-latency trading environments.
• Operate and maintain Palo Alto firewalls, GlobalProtect VPNs, and ZScaler security platforms (ZIA/ZPA).
• Support VMware SD-WAN (VeloCloud) deployments across branch and remote trading locations.
• Monitor and optimise network performance (latency, throughput, availability) on critical links.
• Assist with network automation initiatives and maintain accurate documentation.

Required Skills & Experience

• Deep hands-on experience with multicast routing in high-throughput environments.
• Strong knowledge of BGP , enterprise routing, and switching best practices.
• Proficiency in managing Aruba and Arista switch infrastructure .
• Prior experience supporting low-latency trading networks or other performance-sensitive environments.
• Expertise in configuring and maintaining Palo Alto Networks firewalls and GlobalProtect VPN .
• Familiarity with ZScaler ZIA/ZPA and securing global internet egress traffic.
• Experience with VMware SD-WAN (VeloCloud) or comparable SD-WAN solutions.
• Ability to diagnose and troubleshoot complex network issues across all layers of the OSI model.