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Senior Network Engineer

United Kingdom 45000.00 GBP / Year · Job Posted January 15, 2026
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Job Description

We are seeking an experienced Senior Network Engineer to join a growing network operations team, providing senior-level support across complex enterprise network and security environments. This role is focused on BAU support, troubleshooting, and operational stability, supporting critical customer infrastructure in a home-based capacity. You will act as a senior escalation point within the team, supporting secure, resilient LAN, WLAN, and network security platforms, while helping to drive service quality and continuous improvement.

Job Responsibility

  • Providing 3rd-line support and escalation for complex network and security incidents
  • Supporting and maintaining Cisco Security technologies, including: ASA, FirePOWER, FTD & FMC, Cisco ISE (NAC, identity and policy enforcement), Cisco Umbrella, Cisco DNA Center (DNAC)
  • Supporting enterprise LAN environments (Cisco Catalyst switching)
  • Supporting and troubleshooting enterprise WLAN environments, including controllers and access points
  • Diagnosing issues across routing, switching, wireless and security domains
  • Performing configuration changes, upgrades, patching and routine maintenance
  • Monitoring network performance, availability and security posture
  • Creating and maintaining operational documentation, runbooks and knowledge articles
  • Providing technical guidance and mentorship to junior engineers

Requirements

  • 5+ years’ experience supporting enterprise network and security environments
  • Strong hands-on experience with Cisco Security platforms (ASA, FirePOWER, FTD, FMC, ISE, Umbrella)
  • Strong enterprise networking experience across LAN and routing/switching
  • Proven experience supporting enterprise wireless (WLAN) environments
  • Experience operating as a senior / 3rd-line engineer
  • Excellent troubleshooting and problem-solving skills

Nice to have

  • Experience supporting SD-WAN environments
  • Exposure to network monitoring and management tools
  • Cisco certifications (CCNP Enterprise, CCNP Security or equivalent)
  • Experience within managed services or enterprise operations teams

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