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