Network Security Administrator III (Firewall)

Iridium Satellite•Tempe, AZ

2d•Hybrid

About The Position

Iridium is seeking an experienced Network Security Administrator to manage and support its network security environment. This is a hands-on role focused on firewall administration, secure connectivity, network segmentation, VPNs, and the operation of security infrastructure. The position requires understanding network traffic flow to effectively troubleshoot issues beyond the firewall, including routing, NAT, security policies, VPNs, and authentication. The ideal candidate will take ownership of their work, approach changes carefully, and follow problems through to resolution. This role involves independent work as well as collaboration with network, systems, security, and other technical teams.

Requirements

Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field, or equivalent relevant professional experience.
5+ years of experience in network security, network administration, network engineering, or firewall administration.
Hands-on experience administering enterprise firewall technologies such as Fortinet, Check Point, Palo Alto Networks, Cisco, or comparable platforms.
Strong networking fundamentals, including TCP/IP, routing, switching, VLANs, DNS, NAT, network segmentation, and VPN technologies.
Understanding of network security practices such as least-privilege access, segmentation, secure remote access, and identity-based access controls.
Experience troubleshooting network and security issues using firewall logs, packet captures, traffic-flow analysis, routing information, and other diagnostic tools.
Strong communication and documentation skills, with the ability to work effectively with other technical teams and clearly explain technical issues and solutions.
Ability to work independently, take ownership of assigned work, manage competing priorities, and follow issues through to resolution.
Must be a U.S. citizen.

Responsibilities

Deploy, configure, administer, maintain, and troubleshoot enterprise firewall and network security platforms (Fortinet, Check Point, Palo Alto Networks, Cisco).
Manage firewall policies, NAT, network objects, security zones, routing, segmentation, VPN connectivity, and other network security controls following least-privilege principles.
Administer centralized firewall management, logging, and analytics platforms.
Monitor the health, availability, capacity, and performance of network security infrastructure.
Troubleshoot complex network security and connectivity issues using firewall logs, packet captures, traffic-flow analysis, routing and session information, and other diagnostic tools.
Maintain the reliability and security of firewall platforms through software upgrades, high-availability testing, configuration backups, lifecycle maintenance, and ongoing policy review and optimization.
Develop and maintain network security documentation, including diagrams, configuration standards, operating procedures, implementation plans, troubleshooting guides, and recovery procedures.
Participate in formal change-management processes, including peer review, implementation and rollback planning, validation testing, and post-change verification.
Support projects involving new or upgraded network security technologies.
Collaborate with other technical teams to evaluate, implement, and transition solutions into operational support.