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Technology · Chicago · Onsite

Security Firewall Administrator

Chicago-based onsite role for an experienced Security Firewall Administrator supporting Palo Alto, Fortinet, Cisco, VPN, routing, and critical airport network environments.

We usually respond within three days

Location: Chicago, IL — Onsite Only
Candidates must be able to work onsite at Chicago-area data center locations, including O’Hare and Midway. This is not a remote position.

What You’ll Do

  • Configure, administer, maintain, and troubleshoot Palo Alto, Fortinet, Cisco, and related enterprise network security platforms.

  • Manage firewall policies, ACLs, NAT/PAT, segmentation, logging, VPN connectivity, routing, switching, and LAN security controls.

  • Troubleshoot enterprise network and firewall issues using ICMP, DNS, packet analysis, logs, command-line tools, and monitoring platforms.

  • Configure and support routing protocols including OSPF, BGP, static routing, and related enterprise network services.

  • Configure and troubleshoot TCP/IP, IP subnetting, spanning-tree protocols, VLANs, trunking, tunneling, vPCs, switch stacks, and VSS.

  • Support IPsec VPN configuration, troubleshooting, and connectivity.

  • Perform IOS upgrades, password recovery, and related network maintenance activities.

  • Support Infoblox and DNS architecture where applicable.

  • Monitor network security environments using tools such as Panorama, FortiManager, Cisco DNA Center, Cisco Prime, Cisco ISE, SolarWinds, or similar platforms.

  • Support incident response, outage troubleshooting, service restoration, and escalation activities.

  • Maintain accurate incident, service request, and change-management documentation in ServiceNow.

  • Develop implementation plans, test plans, contingency plans, backout plans, firewall change documentation, network diagrams, and operational procedures.

  • Coordinate work with project managers, technical leads, vendors, client stakeholders, and internal infrastructure teams.

  • Contribute to consistent change-management, documentation, security, and operational procedures.

  • Perform other network and security-related activities as assigned.

What We’re Looking For

  • 5+ years of enterprise network engineering, firewall administration, or network security operations experience.

  • Strong hands-on experience administering and troubleshooting enterprise firewall and network environments.

  • Palo Alto PCCET certification or equivalent experience.

  • Fortinet NSE 1–3 or higher, or equivalent experience.

  • Strong understanding of firewall rules, ACLs, NAT/PAT, network segmentation, logging, and security policy enforcement.

  • Hands-on knowledge of TCP/IP, IP subnetting, routing, switching, VLANs, trunking, spanning tree, and enterprise network architecture.

  • Experience configuring and troubleshooting OSPF, BGP, static routing, and related network protocols.

  • Experience with IPsec VPN technologies.

  • Strong incident-management, troubleshooting, escalation, and change-control discipline.

  • Experience using ServiceNow or a similar enterprise ticketing and change-management platform.

  • Strong Microsoft Visio or network diagramming skills.

  • Excellent customer service, written communication, verbal communication, documentation, and problem-solving skills.

  • Ability to work effectively across client, vendor, technical, and management teams.

Preferred Qualifications

  • Cisco CCNA or CCNP.

  • Additional Palo Alto, Fortinet, Cisco, or network security certifications.

  • Experience with Panorama, FortiManager, Cisco DNA Center, Cisco Prime, Cisco ISE, SolarWinds, or similar enterprise management platforms.

  • Experience with Infoblox and DNS architecture.

  • College degree in information technology, cybersecurity, networking, computer science, or a related field.

  • Experience supporting highly regulated, mission-critical, or airport technology environments.

Additional Requirements

  • Ability to work onsite at Chicago O’Hare and Chicago Midway airports as the standard work arrangement.

  • Must be able to pass a TSA background check.

  • Valid Driver’s License or State ID required.

  • Ability to support incident response, maintenance windows, and other operational requirements as needed.

Job Details

Pay: $130,000–$150,000 annually, negotiable, plus benefits

Location: Chicago, IL – City of Chicago Airports

Work Arrangement: Onsite; this is not a remote position.

Department
Technology
Locations
Chicago
Technology · Chicago · Onsite

Security Firewall Administrator

Chicago-based onsite role for an experienced Security Firewall Administrator supporting Palo Alto, Fortinet, Cisco, VPN, routing, and critical airport network environments.

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