Network Implementation Engineer

Level 3 Network Implementation Engineer Location - Farringdon, London. Travelling requited to multiple locations within UK Travel expenses would be covered Key Highlights: Ownership of LLDs derived from HLDs End-to-end implementation leadership Advanced L3 troubleshooting & RCA Deep Palo Alto (PAN-OS, SD-WAN, GlobalProtect, Panorama) Dell L2/L3 switching (OSPF/BGP preferred) Cisco Meraki wireless deployment Enterprise migration & cutover ownership Job Title: Level 3 Network Implementation Engineer Job Summary We are seeking a highly skilled Level 3 Network Implementation Engineer with strong expertise in designing and implementing enterprise network solutions. The ideal candidate will be responsible for developing site-specific Low-Level Designs (LLDs) based on approved High-Level Designs (HLDs), and leading complex implementations across security, SD-WAN, switching, and wireless technologies. This role requires deep hands-on experience with Palo Alto firewalls, PAN-OS SD-WAN, Dell switching platforms, Cisco Meraki wireless solutions, and centralized management using Strata Cloud Manager / Panorama. Key Responsibilities Develop detailed site-specific LLDs based on approved HLDs and customer requirements Lead end-to-end implementation of enterprise network and security solutions Deploy, configure, and optimize Palo Alto Firewalls (including NAT, security policies, IPSec VPN, GlobalProtect, routing) Implement and troubleshoot PAN-OS based SD-WAN solutions Configure and manage Dell switching (Layer 2/Layer 3, VLANs, STP, routing protocols, QoS) Deploy and optimize Cisco Meraki Access Points, including SSID configuration, RF tuning, and security policies Configure and repoint network devices and security appliances to new RADIUS servers for authentication and authorization services Manage centralized firewall operations via Strata Cloud Manager / Panorama Design and implement secure Remote Access solutions, including Palo Alto GlobalProtect and/or Prisma Access Perform migrations, upgrades, and cutovers with minimal business disruption Conduct configuration reviews, validation testing, and performance tuning Provide advanced (L3) troubleshooting and root cause analysis Create and maintain detailed technical documentation and as-built diagrams Collaborate with architecture, operations, and customer teams during implementation lifecycle Ensure seamless handover to Operations, including documentation, KT sessions, and operational readiness validation Provide post-implementation Hypercare support to stabilize the environment and address any transition-related issues Technical Skills & Expertise Security & Firewall Strong hands-on experience with Palo Alto Networks Firewalls Expertise in PAN-OS features (Security Profiles, App-ID, User-ID, NAT, VPNs, SD-WAN) Experience with Panorama and/or Strata Cloud Manager Knowledge of Zero Trust and segmentation strategies Remote Access solutions (Global Protect / Prisma Access) SD-WAN Experience deploying and troubleshooting PAN-OS SD-WAN solutions WAN optimization, path selection policies, and performance monitoring Switching Experience with Dell enterprise switches Strong understanding of VLANs, trunking, STP, LACP, routing (OSPF/BGP preferred), QoS Wireless Experience deploying and managing Cisco Meraki APs RF design basics and wireless troubleshooting Meraki Dashboard configuration and monitoring Qualifications Bachelor’s degree in Computer Science, Information Technology, or related field (or equivalent experience) 10–15 years of hands-on network implementation experience Experience in enterprise or multi-site deployments Strong documentation and communication skills