Network Architect / Senior Network Architect / Network Security Architect / Network Infrastructure Architect

Role Summary:Own the design, architecture, and evolution of client's IT network domain — covering network, firewall, proxy, load balancing, and NSX — as well as compute and public cloud network and security across Azure and AWS. This role spans the full stack: classic physical networking, private VMware cloud (NSX), through to public cloud and hybrid connectivity. Key Responsibilities· Design and maintain NSX network virtualization architecture across the SDDC estate· Own Cisco ACI fabric design: tenant/VRF segmentation, EPG structure, bridge domains, leaf/spine topology· Architect and oversee firewall design, policy, and lifecycle across the network estate· Architect and oversee proxy services as part of the network domain· Design and maintain load balancing architecture (on-prem and cloud, e.g. WAF-fronted LBaaS)· Lead large-scale datacenter migration and decommission programs (multi-country, thousands of devices)· Public cloud networking: Azure and AWS, including hybrid connectivity back to on-prem and both classic and cloud-native network architectures· Extend architecture ownership into compute, ensuring network/security design aligns with compute platform needs· Build and evolve automation/tooling for network operations and auditing at scale· Operate within and help evolve client's broader IT network environment, working across teams and contracting layers Required Skills & Experience· Classic physical networking (routing, switching, datacenter fabric)· Deep hands-on expertise with VMware NSX (private cloud networking)· Public cloud networking: Azure and AWS, hybrid on-prem connectivity· Strong Cisco ACI experience: VRF/tenant segmentation, EPG/bridge domain design, fabric operations· Firewall architecture and operations· Proxy architecture and operations· Load balancer / WAF architecture (on-prem and cloud)· Working knowledge of computer platforms and their interaction with network/security design· Experience in security is a plus