On-Site Infrastructure Network Engineer — San Jose

SK AX USA Inc; San Jose (CA); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Employer-paid medical, dental, vision

401(k) match

PTO & Holidays

Paid lunch

Relocation assistance

Bonus opportunity

Job summary

SK AX USA, Inc. seeks an experienced Infrastructure Network Engineer to design, implement, and manage network infrastructure in San Jose, California.

You will support network availability, scalability, and security through hands‑on configuration, monitoring, and troubleshooting across multiple vendor platforms. You will work with on‑site teams, vendors, and global colleagues to maintain dependable connectivity and document configurations, procedures, and incident resolutions.

Qualifications

• Five or more years of experience in network infrastructure design, deployment, administration, and troubleshooting.
• Hands-on experience supporting LAN/WAN environments and configuring network equipment across multiple vendor platforms.
• Experience using network monitoring tools to investigate incidents and improve performance.
• Bachelor’s degree in Network Engineering, Information Technology, Computer Science, or a related field, or equivalent professional experience.

Responsibilities

• Design and deploy LAN/WAN solutions that meet business requirements for availability, performance, scalability, and security.
• Evaluate network requirements and recommend improvements to architecture, capacity, and connectivity.
• Plan network upgrades and validate configurations and connectivity before implementation.
• Configure and maintain routers, switches, firewalls, L4/L7 load balancers, IP PBX systems, and related network equipment.
• Maintain device configurations, configuration backups, and network inventories.
• Coordinate equipment updates and configuration changes with stakeholders to minimize operational disruption.
• Monitor network availability, utilization, and performance using appropriate monitoring tools.
• Investigate alerts and identify potential capacity, reliability, or security concerns.
• Implement automation to improve routine administration, configuration consistency, and operational efficiency.
• Coordinate UTP and fiber‑optic cabling installations, testing, and troubleshooting with vendors and on‑site teams.
• Maintain accurate network diagrams, IP address records, device inventories, and configuration documentation.
• Document operating procedures, technical changes, and troubleshooting guidance to support ongoing maintenance and knowledge sharing.
• Diagnose and resolve connectivity, routing, VPN, security, and network performance issues.
• Coordinate with internal teams, service providers, and equipment vendors to restore service.
• Conduct root cause analysis and implement corrective actions to reduce recurring incidents.
• Communicate issue status, operational impact, and resolution progress to relevant stakeholders.

Skills

Network design

LAN/WAN support

Network troubleshooting

VPN configurations

TCP/IP/*

Security principles

Documentation

English communication

Korean language

VMware/Hyper-V

Education

Bachelor's degree in IT / Networking

Tools

Cisco IOS

VMware

Hyper-V

Job description

SK AX USA, Inc. seeks an experienced Infrastructure Network Engineer to design, implement, and manage network infrastructure in San Jose, California.

You will support network availability, scalability, and security through hands‑on configuration, monitoring, and troubleshooting across multiple vendor platforms. You will work with on‑site teams, vendors, and global colleagues to maintain dependable connectivity and document configurations, procedures, and incident resolutions.