Network Security Engineer

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 skilledNetwork & Security Engineerto join their growing team. This is a permanent opportunity offering up to£80,000, with hybrid working arrangements based inCentral 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 withmulticast routingin high-throughput environments.
• Strong knowledge ofBGP, enterprise routing, and switching best practices.
• Proficiency in managingAruba and Arista switch infrastructure.
• Prior experience supportinglow-latency trading networksor other performance-sensitive environments.
• Expertise in configuring and maintainingPalo Alto Networks firewallsandGlobalProtect VPN.
• Familiarity withZScaler ZIA/ZPAand securing global internet egress traffic.
• Experience withVMware SD-WAN (VeloCloud)or comparable SD-WAN solutions.
• Ability to diagnose and troubleshoot complex network issues across all layers of the OSI model.