Deep hands-on expertise in one of the following two areas, and working familiarity with the other: — Data center networking: leaf-spine and top-of-rack fabric design, BGP, ECMP, VLAN and VXLAN, EVPN, and switch platforms from at least one major vendor (Arista, Cisco, Juniper, NVIDIA/Mellanox, or comparable). Site work requires the ability to pass customer background and site-access screening, wear personal protective equipment, and move safely through active construction and live data hall environments, including areas with limited clearance, elevated noise, and restricted access.