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Job Title


Senior Network & Security Engineer


Company : IO Associates


Location : London, England


Created : 2026-03-04


Job Type : Full Time


Job Description

Senior Network & Security Engineer (VCF / NSX-T / Automation) - Inside IR35 - London - Central (Hybrid) We're looking for an experienced Senior Network & Security Engineer to support the design, delivery, automation, and security hardening of a complex VMware Cloud Foundation (VCF) / NSX-T estate within a high-security environment. Role Details: Contract length: 6 months (rolling) Daily rate: 500-600 per day (Inside IR35) IR35 status: Inside IR35 Location: Hybrid - on-site in London Start date: ASAP Clearance: SC Cleared required (DV preferred) - DV Eligible Key Responsibilities: Lead end-to-end NSX-T design within VCF environments (multi-site / multi-tenant) Own architecture across advanced SDN patterns including multi-Edge Cluster , multi-VRF , multiple NSX instances , and NSX Federation Produce clear, defensible HLDs / LLDs and supporting architecture documentation Deploy and configure NSX-T components: fabrics, Edge nodes, transport zones, T0/T1 gateways, VRFs, NAT, routing Support migrations, policy transformations, upgrades, and best-practice implementation Implement security hardening and zero-trust controls, including: Distributed Firewall (DFW) , Gateway Firewall , micro-segmentation Hardening across SDDC Manager / vSphere / NSX-T , RBAC , certificate management, and logging Build automation using PowerShell and NSX-T Policy/Manager APIs (deployment, policy configuration, compliance checks, ops automation) Produce runbooks, troubleshooting guides, and BAU handover documentation Skills & Experience: Strong hands-on experience with VMware Cloud Foundation (VCF) Deep NSX-T expertise (incl. multi-Edge, multi-VRF, Federation, complex routing/segmentation) Strong PowerShell scripting and API-driven automation experience (NSX-T) Proven delivery experience in high-security / regulated environments Strong documentation capability (HLD/LLD + operational artefacts) Nice to Have: NSX PowerShell Policy modules Terraform / Ansible automation exposure VMware certifications SIEM / logging integrations TPBN1_UKTJ