Sr Principal Network Engineer

Responsibilities:

Network Operations (60%)

• Provide operational support for network infrastructure in Korea, while also participating in global network operations as required
• Collaborate with global infrastructure and network teams to ensure consistent standards and best practices across regions
• Proactively monitor network performance and availability; analyze logs and metrics for local and global environments
• Troubleshoot and resolve network incidents and service interruptions
• Execute routine maintenance tasks, updates, and patches on network devices
• Maintain accurate and up-to-date network documentation, diagrams, and configurations
• Support network-related portions of local and global infrastructure projects
• Assist in implementing and enforcing network policies and security standards in collaboration with global teams
• Coordinate lifecycle management of network hardware and inventory
• Prepare and deliver reports on network health, highlighting trends both locally and globally

Cyber Security Operations (40%)

• Act as key on-site contact in Cyber Security Incident Response
• Collaborate with global security teams for threat detection, analysis, and proactive threat hunting
• Investigate and respond to security incidents, escalating as appropriate, and working with global incident response teams
• Conduct vulnerability assessments and coordinate remediation efforts in partnership with global security teams
• Responsible on site’s Operational Technology (OT) Manufacturing System security
• Maintain and operate security controls including firewalls, IDS/IPS, endpoint protection, MFA, and DLP systems
• Support the implementation of security patches across network and server infrastructure
• Assist in security audits, compliance checks, and risk assessments for both Korea and global operations
• Document and improve security operational procedures and runbooks
• Contribute to Security Awareness training efforts in Korea and collaborate on global initiatives
• Participate in the development and enhancement of security policies in coordination with global security policy groups
• Stay informed on emerging threats and share recommendations for enhancing security posture locally and globally

Basic Qualifications:

• 5+ years of combined experience in network operations, network security, or cyber security roles
• Solid technical expertise in enterprise networking (TCP/IP, routing, switching, VLANs, VPNs, wireless)
• Practical experience with network monitoring and troubleshooting tools
• Familiarity with security monitoring platforms (e.g., SIEM, EDR, IDS/IPS)
• Experience in incident response and security analysis
• Knowledge of vulnerability management processes
• Understanding of security frameworks (e.g., NIST, ISO 27001) and regulatory compliance
• Experience working in or supporting cloud environments (Azure, AWS, or Google) from a network and security perspective
• Strong troubleshooting skills and attention to detail
• Excellent communication and documentation skills, comfortable collaborating in an international environment
• Proficiency in both Korean and English communication is preferred for effective global collaboration
• Experience in a manufacturing facility a plus, but not required

Additional/Preferred Skills/Certifications

• Extensive experience configuring, deploying, and troubleshooting platforms and technologies including but not limited to the following:
  • Layer2/3: Cisco Catalyst, Nexus, Meraki Switch
  • Firewalls: Palo Alto, Fortigate
  • Network Management: Solarwinds
  • Wireless: Meraki, FortiAPs
  • Network segmentation and Zero Trust principles
  • Security incident response processes and playbooks
  • Log analysis and forensic investigation
  • Cloud security architecture and controls
  • Network monitoring and analysis tools: Wireshark, Solarwinds

• Experience working in multinational organizations with global IT/security collaboration
• Technical writing for management, operations, and audits
• Strong organizational skills and ability to manage multiple priorities in a dynamic environment
• Language Proficiency in both Korean and English
• Relevant certifications such as:
  • Network: CCNP, CCNA, PCNSA
  • Security: CISSP, SSCP, CompTIA Security+, CEH, GIAC certifications
• Familiarity with OT, ICS, PLC, HMI, IPC is added advantages Monitor security events and alerts from security platforms in both local and global contexts