Senior Network Engineer Orange

Duties and responsibilities

• Manage and maintain a hybrid network environment, including Cisco ACI (Application Centric Infrastructure) and legacy networking systems (traditional switching, routing).
• Monitor, configure, and optimize data center network performance, ensuring minimal downtime.
• Regularly review and maintain network configurations, policies, and security compliance across the ACI fabric and legacy systems.
• Serve as an escalation point for Level 1/2 NOC engineers for complex network issues, including ACI fabric and legacy networks.
• Conduct in-depth diagnostics of routing protocols (e.g., OSPF, BGP, EIGRP), VLAN, VRF, VxLAN, and other networking technologies.
• Perform root cause analysis for recurring issues, providing actionable insights and long-term solutions.
• Ensure that incidents are resolved within the defined Service Level Agreements (SLAs).
• Liaise with vendors (e.g., Cisco TAC) for advanced troubleshooting and hardware/software issues.
• Open, track, and manage support cases with vendors when required, ensuring timely resolution.
• Utilize network monitoring tools to ensure proactive detection and resolution of network issues.
• Document and maintain detailed incident reports and network performance data for analysis and reporting.
• Track and ensure that incident response and resolution meet established SLAs.
• Provide regular reports on network health, incidents, and SLA compliance to management and customers
• Lead planned maintenance activities, including software upgrades, hardware replacements, and network reconfigurations with minimal disruption to services.
• Support capacity planning and scalability initiatives for future network needs.
• Maintain comprehensive network documentation, including topologies, configurations, and procedures.

Job specification

Experience.

1. 5+ years of experience working in a NOC, data center, or similar network support environment.
2. Hands on Cisco ACI networks, including fabric management, APIC configuration, and troubleshooting.
3. Experience with Infoblox DDI (DNS, DHCP, IPAM).
4. Experience with (xSTP, vPC, FabricPath, OSPF, BGP/MP-BGP, VXLAN/EVPN, ACI (L2out, L3out, L4-7 service graphs).
5. Understanding the Architecture and Traffic flow for the Cisco ACI solution.
6. Expert level knowledge in the areas of: IP inter-working, LAN Switching Protocols (MLS, CEF, Trunking (802.1Q), STP, HSRP, LACP/PAGP), IP Routing protocols (ISIS, OSPF, EIGRP, BGP).
7. Experience in managing Cisco ASR/ISR routers.
8. Upgrade APIC, Nexus and Catalyst 9K.
9. Use Postman collections to configure quick tasks on the fabric.
10. In-depth knowledge of network management, network availability capacity planning
11. Cisco Certified Network Professional (ENCOR , DCCOR or equivalent) is must.
12. Scripting/automation skills (e.g., Python, Ansible) to enhance network operations is a plus.

Skills and abilities

• Very good English both spoken and written.
• Very good computer skills.
• Strong Customer Orientation.
• Strong communication, listening & interpersonal skills.
• Flexibility & ability to work in a team.
• Self-confident with professional behavior & attitude.
• High sense of time management.