Network L3 Engineer

Job Description

Job Description

Role Summary:
Seeking an experienced Network L3 Engineer to provide onsite support for a large enterprise environment. The resource will act as the highest level of technical escalation for complex network issues across SD-WAN, Firewalls, Wireless, Routing, and Switching infrastructure, while driving incident resolution, problem management, optimisation, and network transformation initiatives.
Key Responsibilities:

• Provide L3 technical support and serve as the final escalation point for network incidents and outages.
• Troubleshoot complex issues related to SD-WAN, Firewalls, Wireless, Routing, and Switching technologies.
• Perform root cause analysis (RCA) and implement permanent corrective actions.
• Execute network changes, migrations, upgrades, and maintenance activities.
• Support major incidents and lead technical bridge calls with customer stakeholders.
• Analyse network performance and implement optimisation recommendations.
• Review network designs and provide architecture-level inputs.
• Ensure compliance with security standards, policies, and best practices.
• Support disaster recovery and business continuity initiatives.
• Maintain technical documentation, network diagrams, and operational procedures.
• Coordinate with OEMs, ISPs, and third-party vendors for issue resolution.
• Provide mentoring and guidance to L1/L2 engineers.

Technical Skills Required
SD-WAN

• Cisco SD-WAN (Viptela), Fortinet Secure SD-WAN, Versa or equivalent.
• Overlay/Underlay troubleshooting.
• Policy design and deployment.
• Application-aware routing.
• WAN optimisation and performance analysis.

Firewall

• Fortinet FortiGate (Preferred).
• Palo Alto, Check Point, Cisco Firepower.
• Security policy management.
• VPN (IPSec/SSL VPN) troubleshooting.
• NAT, Security Zones, Threat Prevention.

Wireless

• Cisco Wireless LAN Controllers.
• Cisco Meraki Wireless.
• Aruba Wireless.
• RF troubleshooting and wireless performance optimisation.
• Guest access and authentication troubleshooting.

Routing & Switching

• Cisco Catalyst/Nexus platforms.
• Layer 2 & Layer 3 troubleshooting.
• OSPF, EIGRP, BGP.
• HSRP, VRRP, STP, EtherChannel.
• Multicast fundamentals.
• QoS implementation and troubleshooting.

Additional Skills

• Network Monitoring Tools (SolarWinds, PRTG, NetBrain, DNAC, Meraki Dashboard).
• Packet capture and analysis using Wireshark.
• Network automation exposure using Python, Ansible, APIs.
• ITIL Incident, Problem, and Change Management processes.
• Strong customer-facing and stakeholder management skills.

Certifications (Preferred)

• CCNP Enterprise / CCIE Enterprise.
• Fortinet NSE 4/5/7 or FCSS.
• Palo Alto PCNSE.
• Cisco SD-WAN Specialist.
• Aruba Certified Professional.

Key Competencies

• Strong troubleshooting and analytical skills.
• Ability to handle critical incidents independently.
• Excellent communication and customer management skills.
• Experience working in enterprise and multi-site environments.
• Ability to lead technical discussions and provide strategic recommendations.