Job Summary

The L3 Network Engineer is responsible for designing, implementing, operating, and optimizing enterprise-grade on-premises and cloud network infrastructures. The role requires deep expertise in routing, switching, SD-WAN, wireless, NAC/802.1X, and hybrid cloud networking across Azure and GCP environments. The engineer will act as a technical escalation point (L3), lead architecture reviews, support complex incidents, and drive continuous improvement through standardization and automation.

Key Responsibilities1. Architecture Ownership & Design Authority

- Own and validate LAN / WAN / SD-WAN / Wireless architectures across enterprise environments
- Act as design authority for routing protocols (BGP, OSPF, DMVPN)
- Define network segmentation, routing policies, and resiliency models
- Review and approve HLDs / LLDs created by projects or L2 engineers
- Ensure designs align with scalability, resiliency, and security standards

2. L3 Operations & Escalation Ownership

- Serve as final escalation point (L3) for complex incidents and chronic issues
- Perform deep-dive root cause analysis (RCA) for Sev-1 / Sev-2 incidents
- Define permanent corrective and preventive actions (PCA)
- Own problem records and ensure recurrence prevention
- Drive resolution across network, cloud, and security teams

3. On-Prem Network Engineering (Primary Skill Ownership)

- Enterprise Routing & Switching (LAN/WAN)
- SD-WAN architecture, failover, and traffic engineering
- Wireless (Wi-Fi) design, optimization, and troubleshooting
- 802.1X authentication for wired and wireless access
- Network Access Control (NAC) design and enforcement
- MPLS and enterprise WAN connectivity models

4. Cloud & Hybrid Networking (Secondary but Mandatory for E3.x)

- Azure Networking Design and support: ExpressRoute, vWAN, VNETs, NSGs, UDRs
- BGP-based hybrid routing
- Troubleshoot complex on-prem Azure connectivity issues
- GCP Networking Design and support: VPCs,



subnets
- Cloud routing & firewall rules
- VPN / Interconnect
- Support multi-cloud and hybrid connectivity patterns

5. Documentation & Knowledge Management

- Own and maintain: Network standards, HLD / LLD, SOPs, runbooks, and troubleshooting guides
- Ensure documentation is audit-ready and operationally usable
- Drive standardization across environments

6. Team Enablement & Technical Mentorship

- Provide technical mentorship to L1 and L2 engineers
- Review L2 solutions and guide corrective improvements
- Enable cross-skilling and capability uplift
- Act as technical reviewer for training content and SOPs

Skill MatrixPrimary Skills (Must Have)

- LAN / WAN enterprise networking
- BGP, OSPF, DMVPN
- SD-WAN
- Wireless (Wi-Fi)
- 802.1X & NAC
- MPLS

Secondary Skills (Expected for L3)

- Azure Networking (ExpressRoute, vWAN, VNETs, NSGs)
- GCP Networking (VPC, routing, VPN/Interconnect)
- Hybrid cloud connectivity
- Network monitoring & diagnostics tools

Experience & Qualification

- 8-12+ years in enterprise networking roles
- Minimum 2-3 years in L3 / design / escalation role
- Proven experience in hybrid (Onprem + cloud) networks
- Certifications (preferred, not mandatory):
- CCNP / CCIE
- Azure Network Engineer Associate
- GCP Professional Cloud Network Engineer
- Fortinet NSE 5 - FortiNAC-F Administrator

Behavioral & Professional Expectations

- High ownership and accountability
- Structured problem-solving mindset
- Solid documentation discipline
- Ability to operate under ambiguity and pressure
- Clear communication with stakeholders and leadership

Skill Requirements

1. Advanced Proficiency In Data Lan/Wan Technologies And Troubleshooting Techniques.
2. Strong Analytical Skills For Performing Root Cause Analysis And Resolving Complex Technical Issues.
3. Excellent Communication Skills For Effective Collaboration With Team Members And Stakeholders.
4. Familiarity With It Service Management Tools And Ticketing Systems.

📌 Senior Administrator - Network LAN/WAN (India)
🏢 HCL Technologies
📍 India