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Lead Network Security Engineer/ Architect- freelance - hybrid, London, UK

HybridContractSenior

London, England, United Kingdom · Posted 1 mo. ago

Reports to Head of Data Centre and Network Services.

Responsibilities:
  • Engineer and operate firewall platforms (Palo Alto, FortiGate), F5 BIG-IP, IPS, and proxy/SWG solutions — including rule lifecycle management, policy optimisation, and senior incident response
  • Design and enforce macro/micro-segmentation strategies across Cisco ACI, firewall-based, and hybrid fabric models
  • Architect secure proxy, TLS inspection, and Zero Trust connectivity patterns for on-prem, cloud, and hybrid traffic flows
  • Deliver HLDs, LLDs, runbooks, and design standards; provide technical sign-off and risk assessments for major programmes
  • Support compliance and audit with traceable, governance-aligned documentation
  • Engage vendors (Palo Alto, Fortinet, F5) and stakeholders across Infrastructure, Cyber Security, and Risk
  • Drive automation and improvement across rule management, ACI workflows, and compliance validation

Requirements

  • Hands-on expertise with Palo Alto, FortiGate, F5 BIG-IP, and proxy/SWG platforms

  • Strong L2–L7 troubleshooting and incident leadership

  • Cisco ACI security and policy design experience

  • Regulated environment experience (e.g., financial services) with strong audit documentation skills

  • Preferred: Cloud security (Azure/AWS), SASE/Zero Trust transformation, automation via Python, Ansible, or IaC


Locations
London, England, United Kingdom
Timezones
United Kingdom

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Skills