Networking & Security Engineer

We are seeking a hands-on Infrastructure & Security Engineer with strong expertise across server, network, and security domains. Security is a core priority for this role, and the successful candidate will play a key part in strengthening and evolving the firm’s security posture in response to an increasingly complex threat landscape, including emerging risks associated with AI. This is a broad and technically engaging role, combining day-to-day operational support with project delivery and ongoing security enhancement. The role requires a proactive individual who can operate as both a technical expert and a thought partner, contributing to secure infrastructure design and continuous improvement. This role is office-based and requires five days per week on-site presence. Key Responsibilities Provide advanced technical support across infrastructure, including server, network, and security-related incidents and service requests Act as an escalation point for 2nd and 3rd line issues across desktop, server, and network environments Has experience working with Windows and Linux (Red Hat/CentOS) environments Support and maintain network infrastructure, including firewalls, switches, VPNs, and wireless systems (primarily Cisco-based) Own and drive security best practices, including system hardening, patching, vulnerability remediation, and endpoint protection Monitor and respond to security events, including log analysis and threat identification, with awareness of modern attack vectors (including AI-enabled threats) Contribute to the design and implementation of secure infrastructure solutions across both BAU and project work Collaborate closely with infrastructure and security teams to deliver enhancements and strategic initiatives Create and maintain clear documentation, including SOPs, architecture diagrams, and runbooks Participate in an on-call rotation to support critical systems outside business hours

Minimum 5+ years’ experience in infrastructure, networking, and security roles Strong hands-on experience with Windows Server and Linux (Red Hat/CentOS) Solid networking knowledge, including TCP/IP, VLANs, VPNs, DNS, DHCP, with practical experience in Cisco environments Demonstrated experience implementing and supporting security controls, including: Patch management and system hardening Endpoint protection and monitoring Identity and access management Good understanding of cyber security principles, including modern threat landscapes and evolving risks (e.g. automation and AI-driven attack vectors) Experience with virtualisation (VMware) and enterprise storage (SAN/NAS) Scripting or automation experience (e.g. PowerShell, Bash) is advantageous Experience in financial services or regulated environments is preferred Strong troubleshooting skills with a structured and analytical approach Able to balance BAU responsibilities with project delivery effectively A thoughtful and forward-looking mindset, with the ability to identify risks and propose improvements Clear and confident communicator, able to engage with both technical and non-technical stakeholders Self-motivated, accountable, and willing to take ownership of issues end-to-end Collaborative and adaptable, with a practical and solutions-focused approach