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Open nowPosted 43 days ago

Senior Network Engineer

Advantest278 open roles

Where
San Jose, CA, USA
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Your applicationOpen nowSenior Network EngineerAdvantest · San Jose, CA, USA

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The clock on this job

Early applications get read.

11.4% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.0%1 day
  2. 4.2%3 days
  3. 11.4%7 days
  4. 17.5%14 days
  5. 34.2%30 days
  6. 43.5%60 days
This job: posted 43 days ago

The posting

Job Description:

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

Requirements:

 7+ years of hands-on enterprise network engineering experience (or 5+ with a relevant degree)

 Expert-level knowledge of Layer 2/Layer 3 switching and routing in production environments

 Strong hands-on experience administering enterprise firewalls (e.g., Palo Alto, Fortinet, Cisco ASA/Firepower, Check Point)

 Proven experience designing, deploying, and troubleshooting site-to-site and remote-access VPNs

 Solid grasp of TCP/IP, subnetting, DNS, DHCP, NAT, QoS, and network security fundamentals

 Demonstrated ability to troubleshoot complex, cross-domain issues under pressure

 Experience working within formal change management and documentation practices

 Strong written and verbal communication skills

Additional Skills Preferred (but not required):

 Security experience: firewall log analysis, incident response support, IDS/IPS, network segmentation, or vulnerability remediation

 Industry certifications: CCNP, CCIE, PCNSE, NSE 4+, JNCIP, CompTIA Security+, or equivalent

 Experience with NAC, 802.1X, RADIUS/TACACS+, or Zero Trust access models

 Cloud networking experience (AWS, Azure, or GCP — VPCs, transit gateways, VPN/Direct Connect)

 Wireless infrastructure experience (Cisco, Aruba, Meraki)

 SD-WAN deployment and management

 Hands-on experience with network automation frameworks and infrastructure-as-code practices (Python, Ansible, Terraform, Git)

 Experience with AIOps or AI-assisted network monitoring, observability, and analytics platforms

 Familiarity with compliance frameworks (NIST, PCI-DSS, HIPAA, SOC 2)

Education & Experience:

 Bachelor's degree in Computer Science, Information Technology, Computer Engineering, Telecommunications, or a related technical field — or equivalent combination of education, certifications, and hands-on experience

 Demonstrated experience supporting multi-site environments with 2000+ users and/or multiple data centers or branch locations

 Experience operating in a 24/7 production environment with defined SLAs, change control, and on-call responsibilities

 Prior experience mentoring junior engineers or serving as a technical escalation point

 Active or recent industry certification (CCNA/CCNP or vendor-equivalent) required; advanced certifications (CCIE, PCNSE, NSE 4+) strongly preferred

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