Lead enterprise SD-Access fabric and spine-leaf network deployments, translating architecture into implementation plans, configuration standards, runbooks, and rollback procedures. Develop IPv4-to-IPv6 migration strategies, troubleshoot routing, segmentation, authentication, and access issues, and support deployment stabilization. Collaborate with engineering, operations, project, vendor, and stakeholder teams while managing risks, change control, validation, and operational handoff for large-scale network modernization efforts.