City of London3 days per week onsiteSalary up to £91,000 per annumNetwork Security Specialist | Permanent | Hybrid Employment Type: Permanent Hybrid: 3-day onsite a week (Moorgate Station) Salary: Up to base £91,000 + Bonus Job Summary: Our client, a leading global investment secto, is seeking a Network Security Specialist to join their Connectivity Engineering Team. This is a hands-on technical role focused on designing, implementing and governing network security controls across a high-performance, mission-critical enterprise environment. you''ll serve as a technical lead across Fortinet, Palo Alto Networks and Zscaler, driving Zero Trust and micro-segmentation adoption across on-premises, cloud and containerised environments. This is an excellent opportunity for a security-focused network engineer who thrives on translating policy into enforceable technical controls and embedding security by design across a complex, regulated organisation. Key Responsibilities: Design, implement and maintain enterprise network security controls including Firewalls, proxies and secure access services (Palo Alto Networks, Fortinet, Zscaler) Design and evolve Zero Trust network architectures, including identity-aware access and micro-segmentation strategies for traditional and containerised workloads Help shape the network security roadmap; produce high- and low-level designs and maintain security standards, patterns and policy definitions Partner with Information Security to translate poli