Network Engineer L3
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Key skills for this role
About the Role
Design and manage enterprise networks, handle escalations, ensure security compliance, and automate processes while mentoring junior engineers.
Key Skills for This Role
Responsibilities
- Own HLD/LLD for enterprise LAN/WAN, DC, and cloud connectivity
- Serve as final escalation point for L1/L2, lead P1/P2 bridge calls and RCA
- Manage BGP policies, OSPF areas, MPLS/VRF, and redistribution
- Enforce network segmentation via VRF, VLAN isolation, firewall zones
- Design and troubleshoot hybrid connectivity between on prem and cloud
- Build automation for config backups, compliance checks, and provisioning
- Own network observability using NetFlow, SNMP, syslog
- Maintain network diagrams, IP plans, and runbooks
- Mentor L1/L2 engineers and conduct peer reviews
Requirements
- Experience as L3 network engineer or equivalent senior role
- Expertise in routing protocols (BGP, OSPF, MPLS) and switching (STP, VPC, MLAG)
- Experience with cloud networking (AWS/Azure VPN, ExpressRoute, Transit Gateway)
- Proficiency in network automation using Python and Ansible
- Knowledge of security frameworks (PCI, ISO 27001, NIST)
Full Job Posting
Roles & Responsibilities
- Own HLD/LLD for enterprise LAN/WAN, DC, and cloud connectivity
- Design redundant, scalable topologies — spine leaf, hub spoke, SD WAN
- Define IP addressing, VLAN structure, routing domains, and segmentation strategy
- Final escalation point for L1/L2 — you close it, not pass it
- Lead P1/P2 bridge calls, drive RCA, own post mortem
- Coordinate with NOC, security, and vendors during major incidents
- Manage and tune BGP policies, OSPF areas, MPLS/VRF, redistribution
- Handle complex STP issues, VPC/MLAG, LACP, and trunk failures
- Own inter DC and ISP peering configurations
- Enforce segmentation — VRF, VLAN isolation, firewall zones
- Review and approve ACLs, firewall rules, NAC policies
- Support audits — PCI, ISO 27001, NIST alignment on network layer
Cloud & Hybrid Networking
- Own AWS/Azure network integration — VPN Gateway, ExpressRoute, Transit Gateway
- Design and troubleshoot hybrid connectivity — on prem to cloud routing
- Collaborate with cloud architects on network policy
Automation & Tooling
- Build and maintain automation — Python, Ansible, Netmiko
- Automate config backups, compliance checks, provisioning workflows
- Integrate with ITSM/IPAM/NMS platforms
Monitoring & Performance
- Own network observability — NetFlow, SNMP, syslog pipelines
- Proactive capacity planning — identify bottlenecks before they become incidents
- Define and track SLAs, latency, packet loss thresholds
Documentation & Change Management
- Maintain accurate network diagrams, IP plans, and runbooks
- Author and review RFCs/change records — no undocumented changes
- Keep post mortems and lessons learned documented
Vendor & Stakeholder Management
- Own TAC cases — Cisco, Palo Alto, Juniper, Fortinet
- Evaluate new hardware/software — PoC, testing, recommendation
- Present technical decisions to management and non technical stakeholders
Mentorship & Leadership
- Technically guide L3 engineers — knowledge transfer, not just answers
- Conduct design and config peer reviews
- Set team standards — naming conventions, hardening baselines, change process
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