City of London3 days per week onsiteSalary up to £91,000 per annumSenior Network Security SpecialistLocation - City of LondonSalary up to £91,000 per annumThe roleYou will own the network security strategy from the ground up, defining policy, shaping the roadmap, and driving Zero Trust and micro-segmentation across a complex, regulated environment. you''ll work shoulder-to-shoulder with the Information Security team to translate policy into enforceable technical controls, and your designs will span on-premises data centres, cloud platforms, and containerised workloads. This is not a purely operational role - we re looking for someone who has grown from hands-on network engineering into a governance and security-led mindset and wants to operate at an architectural level. What you''ll be doing Designing and owning the end-to-end network security strategy and roadmap Leading the adoption of Zero Trust architecture and micro-segmentation across traditional and containerised workloads Partnering closely with Information Security to define and enforce policies across all connectivity layers Acting as technical authority for Fortinet, Palo Alto Networks and Zscaler platforms Producing high- and low-level designs for cloud, campus, WAN and data centre environments Driving governance - design reviews, standards, audit support and regulatory evidence Mentoring engineers and setting best practice across the network team Providing 3rd-line escalation support and subject-matter expertise