Network Data Engineer - L3Location: Plano, TXDuration: long termRate: DOE U.S. Citizens and those who are authorized to work independently in the United States are encouraged to apply. We are unable to sponsor at this timePrimary Technical Skills (Must-Have):Cisco SwitchingRouting (BGP, OSPF, EIGRP)Cisco Nexus (3k, 5k, 7k, 9k)Cisco Wireless (WLC & WAP)Cisco PrimeSecondary Technical Skills (Nice-to-Have):Switching & Routing: Juniper & ClientWireless: Aruba & JuniperRiverbed WAN OptimizerCisco IPSec VPNProduct Knowledge:Cisco Switches: C4500, C9400, C6800, 6500, 2600, 3500, 3600, 3700, 3800, 9200, 9300Cisco Nexus Switches: 9k, 7k, 5k, 3k seriesCisco Routers: 1900, 2900, 8300, 8500 seriesCisco Wireless: 5500 and 9800 controllersCisco IOS and NX OS SoftwareEducational Qualifications:B.E./B.TechExperience Level:10+ YearsResponsibilities:Oversee daily operations and management of LAN & WAN network infrastructure.Configure, troubleshoot, and maintain DC LAN and WAN networks.Monitor and manage wireless network infrastructure.Configure, maintain, and troubleshoot network protocols.Provide input on capacity planning, migration, optimization, and future upgrades.Update and apply Cisco IOS, JUN-OS, and NS-OS hotfixes.Perform regular audits and optimize network devices.Prepare daily, weekly, and monthly performance reports.Conduct root cause analysis and coordinate with vendors.Handle escalated incidents and critical tickets.Plan and execute change management activities.Develop and maintain architecture diagrams and documentation.Ensure adherence to best practices and security hardening.Demonstrate strong communication skills.