Senior Network Engineer L3

Job Title:

Position Overview:

Level 3 Senior Network Engineer

You will be responsible for high-availability environments across 1000+ switches, 2000+ access points, and 17K+ network devices, including SD-WAN and Azure-integrated systems.

Key Responsibilities:

• Act as the Level 3 escalation point for complex network incidents, performance issues, and service outages.
• Configure, deploy, and support Cisco Meraki switches, access points, and firewalls across multiple enterprise sites.
• Support and maintain SD-WAN, Metro Ethernet (ENS), and Dedicated Internet Access (DIA) circuits in coordination with ISPs and managed service providers.
• Perform deep-dive troubleshooting and root cause analysis for high-priority incidents involving routing, switching, wireless, and firewall issues.
• Manage and optimize network performance and uptime using tools such as Meraki Dashboard, Comcast ActiveCore, Azure Monitor, and other NMS solutions.
• Assist in network changes, firmware upgrades, and proactive health checks to ensure infrastructure reliability and security.
• Participate in new site setups, expansions, migrations, and hardware refreshes by deploying and validating network infrastructure components.
• Maintain accurate documentation of network diagrams, device configurations, IP address plans, and standard operating procedures.
• Collaborate with the Network Architect on network design initiatives, upgrades, and implementation of best practices across the organization.
• Provide mentorship and support to L1 and L2 engineers, ensuring effective knowledge transfer and operational alignment.
• Participate in change management and incident management processes, ensuring compliance with internal policies and ITIL practices.
• Conduct packet-level analysis using tools like Wireshark or tcpdump to diagnose traffic and protocol issues.
• Support Azure network configurations including vNets, NSGs, VPN Gateways, and integration with on-premises infrastructure.

Required Skills & Qualifications:

• Minimum 6 years of hands-on experience in enterprise network engineering and operations.
• Strong expertise in Cisco networking technologies, especially Meraki switches, wireless APs, and security appliances.
• Solid understanding of routing and switching protocols: VLAN, OSPF, BGP, STP, HSRP/VRRP, NAT, DHCP.
• Experience supporting SD-WAN deployments and working with ISPs for WAN connectivity and troubleshooting.
• Working knowledge of Azure networking (vNet, NSG, VPN Gateway) is a plus.
• Proficiency in using monitoring and diagnostic tools such as Meraki Dashboard, Wireshark, SolarWinds, and Azure Monitor.
• Strong problem-solving, escalation handling, and analytical thinking abilities.
• Excellent communication skills and ability to collaborate with technical and non-technical stakeholders.

Certifications:

• CCNA

  required

• CCNP (Enterprise or Security)

  strongly preferred
• Azure Network or Cloud certification is a plus