Network Security Engineer II

• Administer, monitor, and optimize Web Application Firewall platforms to protect internet-facing and internal applications.
• Support and maintain Network Access Control technologies, including device profiling, policy enforcement, segmentation support, and exception handling.
• Operate and tune Intrusion Detection and Intrusion Prevention Systems to improve detection accuracy and reduce false positives.
• Partner with the IT Networking team on secure network design, routing, switching, firewall, segmentation, and connectivity initiatives.
• Assist other Security and IT teams by reviewing security events, alerts, logs, and traffic patterns to identify potential threats or misconfigurations.
• Assist with the implementation of network security architecture standards, hardening guidelines, and secure configuration baselines.
• Participate in incident response activities related to network-based threats, unauthorized access, or suspicious traffic.
• Develop and maintain documentation, including network security diagrams, platform runbooks, standard operating procedures, and change records.
• Support vulnerability remediation efforts related to network infrastructure, application exposure, and security control gaps.
• Perform policy reviews and rulebase hygiene for WAF, NAC, IDS, and IPS technologies.
• Participate in change management activities, including risk assessment, implementation planning, testing, and post-change validation.
• Collaborate with security operations, infrastructure, application, and compliance teams to support business and regulatory requirements.
• Assist with lifecycle management for network security tools, including upgrades, patching, certificate management, integrations, and capacity planning.
• Provide technical recommendations to improve visibility, segmentation, access control, and threat prevention across the environment.

• Experience: 8+ years of network security, infrastructure security, and/or security engineering. Practical and demonstrated experience working Web Application Firewalls, Network Access Control platforms, IDS/IPS technologies, Firewalls or secure network gateways in platforms by Cisco, Palo Alto, Trend Micro, Gigamon, Trellix, etc.
• Education: Bachelor’s degree in Cybersecurity, Information Technology, Computer science or a related field.
• Technical Expertise: Advanced level knowledge of networking concepts, including TCP/IP, DNS, DHCP, VLANs, routing, switching, NAT, VPNs, and network segmentation. Experience analyzing logs, packet captures, alerts, and network traffic to troubleshoot issues or investigate security events. Familiarity with common network and application-layer attack techniques. Experience supporting production environments and following change management processes. Strong troubleshooting, documentation, and communication skills.
• Language Skills: Excellent stakeholder management and communication skills. Proficient in English for effective communication and coordination.
• Schedule: This is an onsite position requiring presence in the Irvine office five days per week. Some after-hours or weekend work may be required for planned maintenance, incident response, or critical security changes.

• Experience: Experience with enterprise WAF policy tuning, bot protection, API protection, or application security rule sets. Experience with NAC deployment models, including 802.1X, MAC authentication bypass, posture assessment, guest access, and device profiling. Familiarity with SIEM, SOAR, vulnerability management, endpoint security, or cloud security tools. Scripting or automation experience using Python, PowerShell, APIs, or infrastructure-as-code tools.
• Education and Certifications: Masters degree in Cybersecurity, Information Technology, Computer Science or a related discipline is preferred. Industry-recognized credentials such as Security+, Network+, CCNA, CCNP Security, PCNSE, CISSP, GSEC, GCIH, or vendor-specific certifications.

• Language Skills: Bi-lingual in English and Korean language proficiency is preferred to support global coordination and communication.

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