Network & Security Engineer

Network & Security Engineer – Multi-Strat Hedge Fund | London

A leading systematic hedge fund is seeking a Network & Security Engineer to join its infrastructure team, supporting and evolving a highly performant, security-conscious trading environment. This is a broad, hands-on role sitting across network engineering, infrastructure, and security, offering exposure to both day-to-day operations and longer-term project work. You’ll play a key role in maintaining and improving the firm’s network and security posture, while contributing to ongoing infrastructure growth driven by continued business expansion.

Role:

• Provide support across server, network, and security-related incidents and service requests
• Operate across a varied remit, combining BAU support, project delivery, design contribution, and security enhancement initiatives
• Manage and support core network infrastructure, including firewalls, switches, VPNs, and wireless systems (predominantly Cisco-based)
• Strengthen and evolve the firm’s security posture in line with an increasingly complex threat landscape, including emerging AI-related risks
• Drive security best practices across the environment, including system hardening, patching, vulnerability remediation, and endpoint protection
• Monitor and respond to security events, performing log analysis and threat identification
• Act as a 2nd/3rd line escalation point across desktop, server, and network environments
• Produce and maintain clear documentation, including SOPs, runbooks, and architecture diagrams

Requirements:

• 5+ years’ experience across infrastructure, networking, and security roles
• Strong Windows Server and Linux (Red Hat/CentOS) experience
• Solid networking fundamentals (TCP/IP, VLANs, VPNs, DNS, DHCP) within Cisco environments
• Hands-on experience with network security technologies (e.g. Cisco Firepower)
• Strong understanding of security controls, including patch management, system hardening, monitoring, endpoint protection, and IAM
• Good understanding of modern cyber security principles and evolving threat landscapes
• Experience with virtualisation (VMware) and enterprise storage (SAN/NAS)
• Proven ability to operate across both BAU support and project-based work
• Desirable: Financial services experience and scripting/automation (PowerShell/Bash)
• Additional exposure beneficial: Cisco SD-WAN, MPLS, BGP troubleshooting, and colocation connectivity

Company Highlights:

• Established London-based hedge fund with a global footprint and a strong track record of performance
• Strong operations across Fixed Income and Macro strategies, with ongoing expansion into new areas/strategies
• Ongoing investment in infrastructure, driving a strong pipeline of projects across networking, compute, and security
• Lean environment supporting c.400 users – offering broad technical exposure across the full infrastructure stack
• Non-Siloed Teams - Highly diverse role with the opportunity to significantly broaden skillset across networks, systems, and security
• Collaborative, technology-driven culture with close interaction across teams
• Benefits: Free breakfast, lunch, and dinner, corporate gym membership, onsite wellness facilities, private medical, and more