The role
Experience: 8–12 Years
Location: Issy-les-Moulineaux, Paris, France
Employment Type: Permanent
We are seeking an experienced Network L3 Administrator with strong hands-on expertise in enterprise networking environments. The ideal candidate will have deep technical knowledge of Aruba and Cisco LAN/Wireless solutions, advanced troubleshooting skills, and experience supporting international customers in complex network infrastructures.
K͏ey Responsabilities
· Provide Level 3 support for enterprise LAN and Wireless networks, ensuring high availability and performance.
· Troubleshoot and resolve complex network issues related to TCP/IP, OSI model, LAN, WLAN, and enterprise switching environments.
· Design, install, configure, and support Cisco and Aruba network infrastructures, including switches, wireless controllers, gateways, and ClearPass.
· Perform advanced troubleshooting of LAN technologies such as VTP, STP, ACLs, Port Channels, LAG, VSF, VSX, and gateway redundancy protocols (HSRP, VRRP, GLBP).
· Configure and manage wireless security technologies including WPA, WPA2, 802.1X, PSK authentication, and encryption protocols (AES, TKIP, WEP).
· Configure HREAP and FlexConnect Access Points for remote and branch office deployments.
· Lead and support network migration and deployment projects, ensuring minimal downtime and compliance with enterprise standards.
· Prepare and maintain technical documentation including LLD, HLD, Visio diagrams, and testing scripts.
· Support ClearPass policy creation, access control, and authentication workflows.
· Work with cross-functional TAC teams to resolve critical and high-severity incidents.
· Provide remote support to international customers across different time zones.
· Perform root cause analysis and implement permanent fixes for recurring network issues.
· Apply strong analytical and problem-solving skills to resolve network issues of moderate to high complexity.
Technical Skills & Expertise͏
Networking & Wireless
- Strong hands-on knowledge of TCP/IP, LAN, WLAN, enterprise switching, and wireless networking
- Practical experience with RF planning, rogue AP detection, and wireless client analysis
Aruba Technologies (Strong Expertise Required)
- Switches: Aruba 6000 & 8000 series
- Access Points: Aruba 500 & 600 series
- Gateways: Aruba 900 series
- ClearPass: Virtual node deployment, configuration, and maintenance
- Aruba Wireless: AirWave, Aruba Gateways, Lightweight & Autonomous APs
- Management Platforms: Aruba Central, UXI, CX family products
Additional Skills (Advantage)
- Automation knowledge
- DDI services experience (DNS, DHCP, IPAM)
S͏oft Skills
- Excellent verbal and written communication skills
- Strong customer-handling abilities, with the capability to manage difficult and high-pressure situations
- Proven ability to handle critical issues and work independently
- Strong collaboration skills and ability to work across global teams
Certifications (Mandatory / Preferred)͏
- Aruba Certified Switching Professional, OR
- Cisco Certified Network Professional (CCNP)
Experience: 8-10 Years .
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