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Senior Network Engineer
Career Insights for Network Engineer / Architect
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Based on California data
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What they do
A Network Engineer or Architect designs and builds computer network systems, including software and hardware. Runs program and system tests, solves technical problems and maintains the network system. Designs and analyzes computer network models.
$146,860 / year median in California
-16% projected decline
Job Description
Senior Network Engineer Advantest America United States, California, San Jose 3061 Zanker Road (Show on map) Sep 09, 2026 We are seeking a Senior Network Engineer to support, design, and maintain our enterprise network infrastructure. This role owns day-to-day network operations while also driving architecture and configuration work for new deployments and upgrades. The ideal candidate has deep hands-on expertise with Layer 2/Layer 3 switching, enterprise firewalls, and VPN technologies, and can troubleshoot complex issues across multi-vendor environments with minimal supervision. Security experience is a strong plus.
Responsibilities include:
Network Operations & Support Serve as an escalation point for complex network incidents, performing root cause analysis and driving issues to resolution within SLA
Monitor network health, capacity, and performance; proactively identify and remediate bottlenecks before they impact users
Troubleshoot connectivity issues across VLANs, routing, switching, DNS, DHCP, TCP/IP, and WAN/ISP links
Use packet capture and network monitoring tools to diagnose latency, packet loss, and application performance problems
Manage firmware upgrades, patching, and configuration backups following established change management procedures
Participate in an on-call rotation and support scheduled maintenance windows Network Design & Architecture Design scalable, resilient LAN, WAN, and remote-access solutions that support business growth
Develop network diagrams, IP addressing schemes, VLAN plans, and routing designs
Evaluate and recommend hardware, software, and circuits; participate in vendor selection and technical evaluations
Lead network components of infrastructure projects - site build-outs, migrations, refreshes, and cloud connectivity
Define and maintain network standards, baseline configurations, and technical documentation Configuration & Implementation Configure and maintain Layer 2/Layer 3 switches, including VLANs, trunking, spanning tree, port security, link aggregation, and inter-VLAN routing
Configure and maintain routing protocols (OSPF, BGP, EIGRP, static routing) across the enterprise WAN
Administer enterprise firewalls: security policies, NAT, application control, and access control rules
Build and maintain site-to-site IPsec VPN tunnels between offices, data centers, and third-party partners, including troubleshooting Phase 1/Phase 2 negotiation, rekeying, and tunnel stability issues
Deploy and support remote-access VPN (SSL/IPsec) for end users, including authentication integration and client troubleshooting
Implement network segmentation and access control between environments Collaboration & Documentation Maintain accurate network documentation, runbooks, and as-built diagrams
Provide technical mentorship to junior engineers and help-desk staff
Work with systems, application, and security teams on cross-functional initiatives
Communicate clearly with non-technical stakeholders during outages and project planning
Benefits
- Dental Insurance