Steel Dynamics
From company careers site
Network Administrator
- Location
- Columbus, MS, US
- Work mode
- On-site
- Employment type
- Full-time
About the job
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.
From Steel Dynamics's careers page (Company careers page), checked 29 Oct 2026.
How to apply
- Select Apply on careers-steeldynamics.icims.com. It opens Steel Dynamics's own application form in a new tab, run on Company careers page.
- Fill in the form and upload your résumé there. Jobiwork never sees your application.
- Steel Dynamics will reply to you directly. No real employer asks you for money to apply.
Posted 21 Oct 2026 · checked 29 Oct 2026 · Report this job