Senior Network Engineer

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