Designs and tests IP network implementations while providing expert technical support, operational guidance, real-time network analysis, and solution testing. Performs manual testing of Cisco routing and switching technologies, particularly Cisco IOS-XR platforms. Uses networking protocols and services including IP/MPLS, OSPF, IS-IS, BGP, Segment Routing, VPNs, and QoS. Automation, traffic-generation tools, troubleshooting, communication, and networking certification are important parts of the role.