Designs, deploys, secures, and operates enterprise and service-provider networks across on-premises, colocation, and cloud environments. Manages routing, switching, peering, addressing, firewalls, VPNs, monitoring, automation, capacity planning, and incident response. Maintains documentation and compliance evidence, serves as a technical escalation point, mentors junior engineers, and works directly with customers. The role is remote, includes occasional travel, and requires on-call and after-hours maintenance participation.