Technical Solution Architect in City of London

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 2-3 times a month in London travel when required (Hybrid). Start ASAP in January 2026.

Must have hands‑on design / migration of at least two of the following at scale:

• Check Point R8x firewalls, Cisco or Juniper LAN & 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).

Key skills, experience + tasks will include:

• Network Security architecture or senior engineering across enterprise environments.
• Proven experience as a Technical Design Lead / Technical Authority
• 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.