Technical Solution Architect - LAN, WAN, firewalls, F5, Zscaler ZPA/ZIA, BGP/OSPF 5 Month Contract London (Remote, Hybrid) £330-£400/day (Outside IR35) Technical Solution Design Lead / Technical Authority experience needed for a 5 Month Contract mainly remote with 2 to 3 times a month in London travel when required (Hybrid). Start ASAP in January 2026. Must have handson design / migration of at least two of the following at scale: Check Point R8x firewalls, Cisco or Juniper LAN and WAN, F5 BIG-IP LTM/GTM/AFM, Zscaler ZIA & ZPA, SD-WAN. Working with a global IT Consultancy for a Telecoms end client on large-scale projects. Paying £(Apply online only)/day (Outside IR35). Hybrid working - Contract mainly remote with 2 to 3 times a month in London London. Key skills, experience tasks will include: Network Security architecture or senior engineering across enterprise environments. Proven experience as a Technical Design Lead / Technical Authority Must have hands-on design / migration of at least two of the following at scale: Check Point R8x firewalls, Cisco or Juniper LAN and WAN, F5 BIG-IP LTM/GTM/AFM, Zscaler ZIA & ZPA, SD-WAN. Strong routing fundamentals (BGP, OSPF, route maps, redistribution). Ownership of end-to-end technical design decisions (not implementation-only roles) Demonstrable leadership in complex enterprise or carrier-scale environments Providing end-to-end technical design for complex network security architecture deployments and migrations. Documentation & tooling: Expertise with Visio or draw.io for architecture diagrams; PowerPoint for executive decks; Word/Confluence for LLDs. Familiarity with change tools (ServiceNow, Remedy) and SharePoint governance. Validating / integrating component designs for LAN, firewall, F5, WAN, VPN, ZPA/ZIA security controls. Owning overall solution architecture, low-level designs (LLD), solution integrity from high-level architecture through to handover, acting as the single technical point of contact for external customers. Producing / maintaining architecture decks, LLDs, change packs (ER/CR forms), rollback procedures, and run books. Reviewing implementation artefacts (configs, Ansible/ Terraform scripts, F5 iRules) to ensure alignment to LLD. Qualifications: CCNP/CCIE Enterprise or Security, JNCIP/JNCIE, F5 CTS, Check Point CCSE, Zscaler ZCCA IA / ZCCA IAE, TOGAF, ITILv4. Providing 24/7 escalation cover to meet migration deadlines when rostered