Senior Network Engineer, Cisco ACI & NextGen Firewalls

GCI Incorporated is seeking a Network Engineer to design, implement, and maintain complex enterprise networks. The role requires deep expertise in routing, switching, and security controls, with hands-on Cisco ACI experience across multi-data center environments. The candidate will lead network architecture efforts, troubleshoot issues, and collaborate with cross-functional teams to meet mission requirements. TS/SCI with Polygraph clearance is required for the role.