The Network Engineer is responsible for the operation, maintenance, optimisation, and evolution of the client corporate network infrastructures, covering LAN, WAN, Cybernet (WI‑FI), DMZ/Internet, xDSL, and Remote Access environments. The engineer ensures network performance, security, high availability, scalability, and supports mission-critical services across all client campuses and datacenters.
Your responsabilities
Corporate LAN operations:
Operate EP's LAN across Brussels, Luxembourg, and Strasbourg.
Manage hierarchical CORE / Distribution / Access Cisco-based networks.
Maintain high availability, redundancy, load balancing, and fast convergence mechanisms.
Support VLANs, ACLs, QoS, jumbo frames, Etherchannel, VSS, MSTP, LACP.
Manage migrations toward C9500-Xx, C9400, C9300, C9600 series.
Cybernet Network & WI‑FI:
Operate two large-scale WI‑FI infrastructures (Cisco 98xx + Aruba controllers).
Monitor and optimise ~6500 Access Points across all campuses.
Support advanced RF management (Cisco Rrm / Aruba ARM), multiple Ssids, Wpa2/Wpa3, 802.1X, guest portals, and VXLAN remote AP environments.
Ensure performance during major political events (>2000 concurrent users).
WAN / MPLS Network:
Operate MPLS-based interconnection between campuses and datacenters.
Support Asr9k routers, BGP, OSPF, IS‑IS, L3VPN, VPLS, Diffserv QoS, and Traffic Engineering.
Manage encrypted links over DWDM infrastructures.
Internet Access & DMZ:
Support EP's 20gb/s + 5gb/s Internet access lines.
Operate protected multi-zone architectures behind Firewalls and proxies.
Work with anti‑DDoS solutions and Infoblox DNS clusters.
Remote Access:
Support EP's secure mobility: VPN, Cisco ASA, IronPort, and identity-based access.
Manage connectivity for 4000-5000 simultaneous remote users.
Support 39 EP Remote Offices.
Tools & monitoring:
Use Cisco Catalyst Center (former DNA Center), Aruba Airwave, Cisco Prime, CA Dx Netops, Cisco Nexus Dashboard Insights, Ekahau.
Operate NetScout Taps, Ngeniusone, Vstream collectors.
Support OOB network for console access on strategic devices.
Operational responsibilities:
Security management and urgent iOS updates.
Configuration backup/restore, Hardware/software upgrades.
Fault, incident, problem, and change management.
Performance analysis using advanced monitoring tools.
Asset and inventory management.
Maintain IPAM data and manage DNS/DHCP via Vitalqip.
Coordinate with EP engineering teams and manufacturer TAC.
Manage Cisco SSM licensing platform.
Key competencies
Cisco Enterprise Networks (C9k family, ASR, ACI basics).
Wireless Technologies: Cisco 38xx/37xx, Aruba 5xx/6xx.
MPLS technologies, VPNs, encryption, DWDM links.
Network security, Firewalls, authentication (802.1X, TACACS+, RADIUS).
Monitoring and analysis using Catalyst Center, Airwave, Dx Netops, Ekahau.
Fluent in English (French is an asset)
Experience:
7+ years in complex enterprise network operations.
Strong experience with Cisco switching/routing, WI‑FI, MPLS, BGP, OSPF.
Experience with large multi-site environments, high availability, and secure designs.