Minimum of three years' experience in the last ten years with the building, operating, securing, defending, and extending Local Area Network (LAN)/Wide Area Network (WAN) systems, including wireless components, firewalls, routing and switching, Internet Protocol version 6 (IPV6), VPN, cloud computing, virtualized servers, storage arrays, and other IT/data systems. Lead engineering trade studies and total cost of ownership models comparing refactor, replatform, replace, and retire approaches before changes to legacy architecture; execute approved remediation through Task 4 DevSecOps CI/CD pipelines in modular sprints.