Network Administrator

Network Administrator Job Locations: US-MS-Columbus

ID: 2026-8343

Pos. Category: Information Technology 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. #J-18808-Ljbffr Steel Dynamics