Senior technical authority for network infrastructure at an integrated steelmaking facility. Responsibilities include owning LAN, WAN, wireless, firewalls, and IT/OT segmentation. Requires 5+ years of experience, CCNA, and deep expertise in enterprise/industrial networking.
Key Highlights
Key Responsibilities
Technical Skills Required
Benefits & Perks
Nice to Have
Job Description
Senior Network Engineer — IT/OT Infrastructure
Cleveland-Cliffs | Indiana Harbor Works, East Chicago, IN
Fully onsite • Relocation assistance available
THE ROLE
You'll be the senior technical authority for network infrastructure at Indiana Harbor Works — our integrated steelmaking facility in East Chicago, Indiana. Routing and switching, wireless, firewalls, WAN, and the segmentation boundary between enterprise IT and plant-floor OT. Hands-on senior IC role with real architectural ownership. You report to the Senior Manager, IT Network Security and Services.
This is onsite at the plant. Plant presence is the job.
WHAT YOU'LL DO
• Own the Indiana Harbor network — LAN, WAN, wireless, firewalls, IT/OT DMZ.
• Lead network infrastructure projects: WAN consolidation, carrier transport modernization, lifecycle upgrades.
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• Drive firewall policy, ACL, and segmentation design with Cybersecurity.
• Mature network monitoring and SIEM integration from reactive to proactive.
• Develop SOWs, lead vendor coordination, evaluate SD-WAN, SASE, zero trust, and automation.
• Mentor junior engineers and guide cross-functional IT and OT staff.
REQUIRED
• 5+ years in enterprise or industrial network engineering.
• Deep LAN/WAN, TCP/IP, BGP, OSPF, VLAN, network segmentation expertise.
• Advanced Cisco routing, switching, and wireless experience.
• Firewall policy and next-generation firewall experience.
• Network monitoring platforms (NNMi, PRTG, Splunk, or SolarWinds) integrated with SIEM.
• CCNA certification.
• Bachelor's in Networking, IT, CS, or equivalent experience.
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PREFERRED
• CCNP certification.
• OT/IT convergence in manufacturing, utilities, or energy. Purdue Model, ISA/IEC 62443.
• Next-gen firewalls, network access control, SD-WAN.
• Python, Ansible.
TOTAL REWARDS
• Competitive pay with variable compensation opportunity.
• Health insurance (medical, dental, vision).
• Retirement plan.
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• Education assistance.
• Paid time off.
• Relocation assistance for qualified candidates.
• Career mobility across Cliffs sites in the U.S. and Canada.
ENVIRONMENT
Indiana Harbor is a 24/7 integrated steelmaking facility. This role spends time in both office and plant environments and requires adherence to plant safety protocols and assigned PPE — safety glasses, hard hat, steel-toed metatarsal footwear, long-sleeve shirts, and where applicable, flame-retardant / arc-rated clothing and gas monitoring. Cliffs provides PPE and
training.ABOUT CLEVELAND-CLIFFS
The largest flat-rolled steel producer in North America and the largest manufacturer of iron ore pellets on the continent. Headquartered in Cleveland, Ohio. Approximately 25,000 employees across mining, steel, and downstream manufacturing operations in the U.S. and Canada. Designated as critical infrastructure under CISA.
Cleveland-Cliffs Inc. is an Equal Opportunity Employer — M/F/Veteran/Disability. Drug-free workplace; pre-employment screening required. For accommodation requests: careers@clevelandcliffs.com or 1-(312) 899-3097.
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