Senior Network Engineer (Level 3 Support)

Contract role

Role Summary

The Senior Network Engineer will provide day-to-day operational support for the organization’s global data network infrastructure. This role serves as the Level 3 escalation point for complex network incidents and is responsible for designing, deploying, maintaining, and troubleshooting enterprise LAN/WAN environments. The engineer will ensure network reliability, performance, and security while collaborating with internal teams, vendors, and customers.

Key Responsibilities

Network Design & Implementation

• Design, develop, and deploy LAN/WAN network infrastructure.
• Configure and install network devices and services including routers, switches, firewalls, load balancers, VPNs, and QoS.
• Implement operational and project-related network changes in coordination with project teams.

Network Operations & Support

• Provide Level 3 troubleshooting and support for all LAN/WAN alerts and incidents.
• Identify and resolve network issues quickly to minimize downtime.
• Monitor network performance to ensure availability, reliability, and optimal operation.
• Perform system upgrades, patches, service packs, and security updates.
• Participate in on-call rotation for after-hours support.

Monitoring & Maintenance

• Maintain monitoring and reporting systems.
• Track resource utilization, performance trends, and capacity planning.
• Ensure compliance with configuration and change management policies.

Security & Compliance

• Implement network security tools, policies, and procedures in collaboration with the security team.
• Configure and troubleshoot network security solutions including VPNs, AAA, and firewalls.

Documentation & Collaboration

• Create and maintain documentation for network systems and infrastructure.
• Work closely with vendors, internal IT teams, and offshore teams to resolve issues.
• Participate in change management and incident management meetings.
• Provide regular status updates and administrative reporting.

Required Experience

• Minimum 10 years of networking experience.
• CCNP certification required.
• Experience supporting large enterprise or global network environments.

Technical Skills

Networking & Troubleshooting

• Advanced network troubleshooting and root cause analysis.
• Troubleshooting routing loops, asymmetric routing, and STP loop issues.
• Experience analyzing network performance metrics and device outputs.

Routing & Switching

• Routing protocols: EIGRP, OSPF, BGP
• LAN switching: VLAN, VTP, STP, EtherChannel
• QoS configuration

WAN Technologies

• MPLS, Metro Ethernet
• WAN acceleration and optimization technologies

Network Security

• Cisco ASA, IPS
• IPSec / SSL VPN
• AAA, TACACS+, RADIUS
• Next-generation firewalls (Cisco, Fortinet)

Wireless & Remote Access

• Cisco ISE
• Wireless networks
• Cisco AnyConnect

Infrastructure & Hardware

• Cisco Catalyst and Nexus 7K / 9K switches
• Cisco routers (3900 / 4400 series)
• Cisco IOS configuration and troubleshooting

Application & Protocol Support

• TCP/IP protocol suite
• Application protocols: HTTP, HTTPS, FTP, SMTP, SNMP, SSL
• Application environments such as SAP, Citrix, and enterprise portals

Modern Networking & Cloud

• SD-WAN technologies (Silver Peak, VeloCloud)
• Network segmentation solutions (TrustSec, Tetration, Illumio)
• Cloud networking experience in AWS, Azure, or GCP (preferred)
• Cloud security services such as Zscaler and Cisco Umbrella