This role blends steady-state operational ownership with forward-leaning modernization efforts, with Cisco ISE ownership at the center of the access-control strategy : Own Cisco Identity Services Engine (ISE) policy architecture and operations, including 802.1X, MAB, profiling, posture, and RADIUS authentication. The Senior Network Engineer owns ISE policy architecture, authentication flows, and troubleshooting in production, supporting Zero-Trust-aligned access control across campus, data center, VPN, and cloud-connected environments.