Lead and execute network upgrades across 600+ distributed retail sites. Design, validate, and refine enterprise network architectures and configuration templates. Ensure network solutions align with enterprise standards, scalability, and security. Implement and optimize configurations on Viptela SD-WAN and Cisco IOS-XE platforms. Troubleshoot and resolve advanced WAN connectivity and performance issues. Collaborate with architecture, operations, and implementation teams. Provide technical and design guidance to junior engineers and implementation partners. Document network design decisions, rollout progress, configuration updates, and technical findings.