Infrastructure Network Engineer

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. in San Jose, CA is seeking an experienced Infrastructure Network Engineer to design, implement, and manage our network infrastructure on-site.

You will support network availability, security, and scalability through hands-on configuration, monitoring, and troubleshooting across multiple vendor platforms. The role requires strong technical judgment and day-to-day ownership of operations, with clear communication.

Qualifications

• Five+ years of experience in network infrastructure design and troubleshooting.
• Bachelor’s degree or equivalent experience in IT.
• Proficiency in TCP/IP, routing, DNS, DHCP and VPN configurations.
• CCNA or higher certification.
• Ability to document technical information clearly in English.

Responsibilities

• Design and deploy LAN/WAN solutions meeting availability, performance, scalability, and security.
• Configure routers, switches, firewalls, L4/L7 load balancers, IP PBX systems, and related network equipment.
• Monitor availability and performance; investigate alerts and incidents.
• Coordinate with vendors and on-site teams; document changes and maintain diagrams.
• Implement automation to improve routine administration and operational efficiency.

Skills

Network design

Troubleshooting

English communication

Korean language proficiency

Education

Bachelor’s degree in Network Engineering, IT, CS

Tools

Network monitoring tools

VMware/Hyper‑V

VPN configurations

Cisco device configuration

Job description

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

Full Time San Jose, CA, US

Salary Range: $90,000.00 To $120,000.00 Annually

Location: San Jose, CA, United States — 100% On-Site
Job Type: Full-Time
Schedule: Full-time on-site
Travel: Occasional local travel within the San Jose / Bay Area, as needed
Salary Range:$90,000–$120,000 annually (based on relevant experience, skills, and qualifications; base salary only)
Benefits: 100% Employer-Paid Medical, Dental, Vision | 401(k) Match | PTO & Holidays | Paid Lunch | Relocation Assistance | Bonus Opportunity

SK AX USA, Inc. delivers specialized IT, infrastructure, and digital transformation services across the United States. We support large-scale, mission-critical programs involving advanced infrastructure, operational technology, and next-generation AI environments.

Our infrastructure teams help clients design, implement, and maintain reliable technology environments that support daily operations and future growth.

We are seeking 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. Your responsibilities will include network design, device administration, performance optimization, cabling coordination, and technical documentation.

Working closely with on‑site teams, vendors, and global colleagues, you will resolve technical issues and maintain dependable connectivity across the supported environment.

This role requires strong technical judgment, ownership of day‑to‑day network operations, and clear communication. Korean language proficiency is preferred to support collaboration with our global teams.

• 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.

Security & Compliance

• Maintain secure network configurations, firewall rules, access controls, and VPN connectivity.
• Follow applicable security policies, technical standards, and change management procedures.
• Support network risk identification and remediation in coordination with security and infrastructure teams.

Required Experience

• 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.
• Strong knowledge of TCP/IP, subnetting, routing, DNS, DHCP, and VPN configurations.
• Practical understanding of network security principles and secure device administration.
• Familiarity with virtualization technologies such as VMware or Hyper‑V and network storage solutions.
• Ability to prepare clear technical documentation and communicate effectively in English.
• Korean language proficiency is preferred for collaboration with global teams and headquarters.
• Clear written and verbal communication skills, including the ability to explain technical issues to different audiences.
• Strong organizational skills and attention to detail.
• Ability to coordinate with clients, vendors, and colleagues across locations.
• Ability to manage competing priorities, follow up consistently, and elevate issues appropriately.
• Must be available to work on‑site full‑time in San Jose, California. Relocation assistance is available.
• Must be willing to travel locally within the San Jose / Bay Area as needed.
• Must have or obtain authorization to work in the United States. Visa sponsorship is available for selected candidates.
• Cisco CCNA certification or a higher‑level networking certification.
• Experience with network automation tools.
• Knowledge of cloud networking in AWS or Microsoft Azure.
• Experience supporting manufacturing or industrial IT environments.
• Bilingual proficiency in Korean and English.
• Strong ownership and accountability for network reliability and service quality.
• Proactive, self‑directed approach to troubleshooting and on‑site coordination.
• Careful attention to configuration accuracy, documentation, and follow‑through.
• Comfort working in technical environments with evolving priorities.
• Commitment to continuous learning and improving infrastructure operations.

SK AX USA is an Equal Opportunity Employer. We are committed to providing an inclusive and welcoming environment for all employees and applicants for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, age, disability, genetic information, veteran status, or any other legally protected status.

Why Join SK AX USA?

• Take hands‑on responsibility for network infrastructure that supports critical business operations.
• Work directly with clients, global technical teams, and technology vendors.
• Build experience across network design, implementation, security, and operational support.
• Develop technical expertise and grow toward broader technical leadership responsibilities.
• Enjoy employer‑paid medical, dental, and vision benefits, a 401(k) match, PTO, and additional benefits.