Subsidiary Steel Dynamics Overview Own the day-to-day operation, reliability, and growth of the Cisco-based network infrastructure across the division’s offices, data center, and manufacturing plant. This is a hands-on role for a network professional with strong Cisco skills who is comfortable supporting networks in a manufacturing environment. Responsibilities • Administer, configure, and maintain Cisco routers, Catalyst switches, wireless LAN controllers and access points, and firewalls across office, data center, and plant environments • Manage Cisco firewall and VPN connectivity to remote sites • Implement VLANs, trunking, spanning tree, and inter-VLAN routing per change management procedures • Proactively monitor network health and performance, analyze logs and alerts, and lead troubleshooting and root-cause analysis for complex connectivity, latency, and outage issues • Support plant-floor and OT networks, partnering with OT and controls engineers to keep production systems connected, segmented, and secure • Plan and execute maintenance, IOS upgrades, hardware refreshes, and expansion projects • Oversee installation of switches, access points, optics, and fiber/copper cabling • Maintain accurate network documentation, including device inventory, IP addressing, VLANs, switch-port records, uplinks, configuration backups, and diagrams • Apply network security best practices, including ACLs, port security, segmentation, and configuration standards • Coordinate with system administrators, vendors, service providers, and end users, and mentor junior IT staff • Occasional night and weekend work required Qualifications • Strong, hands-on Cisco expertise, including IOS/IOS-XE CLI, Catalyst switching, routing, and wireless • In-depth knowledge of TCP/IP, IPv4 addressing and subnetting, VLANs, trunking, spanning tree, DNS, and DHCP • Experience configuring and supporting firewalls, VPNs, and network segmentation • Proficiency with network monitoring and troubleshooting tools, and a structured, evidence-based approach to diagnosing problems • Strong documentation habits and clear communication skills with both technical and non-technical audiences • Self-starter who works well independently and as part of a team • Ability to work in an active industrial environment, including heat, noise, required PPE, use of lifts, network closets, and walking long distances through active production areas • Valid driver’s license • Associate’s degree in an IT-related field Preferred: • Cisco CCNA certification strongly preferred; CCNP a plus • 6–8 years of progressive network administration or engineering experience, with significant time supporting networks in a manufacturing or industrial setting • Experience with Cisco Unified Communications Manager (CUCM) • Experience with Cisco Industrial Ethernet (IE) switches • Hands-on experience with fiber optics, SFP modules, and wireless site surveys • Experience supporting network buildouts for new facilities or major plant expansions • Bachelor’s degree in an IT-related field Steel Dynamics, Inc., and all affiliated entities are equal opportunity employers.