Network Administrator

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.