NetSecOps Engineer required by my large client on a brand new project. Network Security Operations within a large-scale retail environment. The engineer will support and partner with the core Networks team to deliver a major Network Access Control (NAC) programme, alongside LAN migration activities across a complex, distributed estate. This role requires deep hands-on expertise in enterprise NAC, network security engineering, and operational readiness testing. Key Responsibilities Lead technical delivery and operational readiness for a multi-phase NAC implementation across hundreds of retail and corporate sites. Collaborate closely with the Networks team to design, configure, test, and deploy NAC policies, authentication flows, segmentation models, and onboarding rules. Support large-scale LAN modernisation and migration activities, including site cutovers, switch refreshes, and security control uplift. Design, test, and validate operational processes, including access policy enforcement, device profiling, guest networks, and remediation workflows. Conduct end-to-end testing cycles (functional, failover, edge-case, and performance) ensuring stability and minimal business disruption. Create and maintain operational documentation, runbooks, topology diagrams, and troubleshooting guides. Support security governance, risk assessments, and operational KPIs related to network security controls. Act as a NetSecOps SME, advising on best practices for identity-based networking and ..... full job details .....