Senior Network Security Specialist

Posted:	05/06/26
Recruiter:	Computappoint
Reference:	3118103709
Type:	Permanent
Disciplines:	Network Security
Salary:	£91,000 Annual
Location:	London
Description:	City of London 3 days per week onsite Salary up to £91,000 per annum Senior Network Security Specialist Location - City of London Salary up to £91,000 per annum The role You 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 to senior stakeholders What we re looking for At least 10 years in regulated, mission-critical environments - financial services background strongly preferred A career path from hands-on network engineering into security governance and architecture Deep practical experience across Fortinet, Palo Alto Networks and Zscaler Proven ability to design and implement Zero Trust and network segmentation strategies Strong grounding in core protocols - BGP, OSPF, VLANs, VRF, VPN, VXLAN, DNS and more Experience securing hybrid environments including Kubernetes and OpenShift workloads Familiarity with automation and infrastructure-as-code for deploying security controls Relevant certifications such as PCNSE, NSE, CCNP Security or CISSP are advantageous Services offered by Computappoint Limited are those of an Employment Business and/or Employment Agency in relation to this vacancy. Computappoint do not use AI to filter or assess candidates, we use experienced and dedicated recruiters, who want to match the best people to roles.
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Senior Network Security Specialist

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