Senior IT Infrastructure Administrator, Networking

Company: Confluence
Apply for the Senior IT Infrastructure Administrator, Networking
Location: London
Job Description:

Overview

In this senior, hands-on role you own the enterprise network stack end-to-end—from design to operations—driving scalable and secure solutions. You act as a technical SME and escalation point, leading complex troubleshooting and continuous improvement across a multi-site environment. You’ll enable the wider team through documentation and best practices while shaping standards and reducing vendor reliance. This is a high-impact, cross-functional role with exposure to modern Cisco technologies and SD-WAN transformation.

Pay / Benefits

  • Generous Time Off packages
  • Global Career Development opportunities
  • Social Events
  • Referral Bonus scheme – Upto $3,000 per successful referral
  • Hybrid working options

Responsibilities

  • Own the full network lifecycle from design through operations
  • Serve as SME and technical escalation point for network issues
  • Lead troubleshooting, root cause analysis, and incident resolution
  • Drive continuous improvement and optimization of the network estate
  • Transfer knowledge and document best practices for the team
  • Collaborate with cross-functional stakeholders on infrastructure initiatives
  • Influence standards and drive changes across large-scale, multi-site infrastructure

Key requirements

  • 8+ years’ experience in enterprise IT infrastructure or networking
  • Strong hands-on experience with Cisco technologies (Firepower, ISE, SD-WAN – Viptela/Catalyst)
  • Deep knowledge of routing, switching, firewalls, VPNs, load balancing
  • Expertise in routing protocols (BGP, OSPF, EIGRP) across multi-site environments
  • Proven experience designing, implementing, and transitioning solutions into production
  • Strong troubleshooting skills including root cause analysis and incident resolution
  • Experience maintaining infrastructure health (patching, upgrades, configurations)
  • Cross-functional collaboration
  • Problem-solving and analytical thinking
  • Ownership and accountability
  • Cisco Firepower
  • Cisco ISE
  • SD-WAN (Viptela)

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Posted: September 14th, 2026