Salary: £65,000 - 75,000 per year Requirements: In-depth knowledge of core network fundamentals including Layer 2/3 technologies, routing protocols such as BGP and OSPF and network troubleshooting. Proven experience in supporting network security functions primarily focusing on Cisco ISE (Identity Services Engine). Proven experience with Ciscos range of products including Catalyst and Nexus switches. Working knowledge of Palo Alto firewalls, Prisma Access and SD-WAN in general will be highly desirable. Certifications in Cisco and Azure (desirable) Responsibilities: Design, implement and manage complex network infrastructure using Cisco campus networking 9300 series and Cisco Nexus switches. Configure and optimise Cisco ISE policies for authentication, authorisation, and accounting (AAA). Monitor and troubleshoot ISE-related issues to ensure optimal performance and security. Administer and configure FortiGate Firewalls for advanced security measures and threat management. Configure, deploy, and maintain Palo Alto Prisma Access firewall policies to ensure secure access to critical applications and data. Monitor network performance, identify issues, and perform necessary troubleshooting to maintain optimal network health. Develop and enforce network security policies, procedures, and standards to protect organisational assets. Maintain, troubleshoot, and support Wireless LAN Controllers and associated Wi-Fi networks. Technologies: Azure Cisco Firewall FortiGate Support LAN Network Nexus Prisma Security Cloud More: We are a leading global professional services firm based in London, seeking a Senior Network Engineer to join our team. This role involves a hybrid working model, with three days per week required in the office. We offer a dynamic environment where you will maintain and enhance our network infrastructure, ensuring security and optimal performance. Join us and be part of a team committed to excellence in network management and security. last updated 6 week of 2026