Cisco LAN & Wireless Networks

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Role: ARUBA (Cisco LAN & Wireless Networks)

Location: Paris, France

Job Type: Full onsite

Language: French and English

Employment Type: Fixed term employment (12 months contract)

Cisco LAN & Wireless Networks

The Level 3 Engineer will be responsible for the expert‑level configuration, optimization, troubleshooting, and management of ARUBA, Cisco LAN & Wireless Networks and F5 BIG‑IP solutions (LTM, GTM, APM). This role ensures the optimal performance, high availability, and security of network infrastructure and application delivery systems across a large‑scale enterprise environment.

Key Responsibilities:

ARUBA

Cisco LAN & Wireless Networks:

• LAN Switches (Cisco Catalyst, Nexus): Design, configure, and optimize LAN architectures, including VLANs, STP, QoS, and routing protocols. Manage high‑availability designs and troubleshoot complex Layer 2/Layer 3 issues.
• Wireless Networks (WLC & APs): Lead design and troubleshooting of Cisco WLAN solutions, optimize wireless security (WPA2/WPA3, 802.1X), and manage guest access and roaming issues.

F5 BIG‑IP Configuration & Management:

• Deployment & Management: Design and manage F5 BIG‑IP solutions (LTM, GTM, APM), including advanced load balancing, SSL offloading, and traffic management.
• Troubleshooting: Provide expert troubleshooting for F5 application delivery issues, including traffic routing, SSL termination, and performance bottlenecks.
• Integration & Security: Integrate F5 with network security solutions, and implement DDoS mitigation and DNSSEC.

Network & Application Performance:

• Monitor and optimize the performance of Cisco and F5 systems using tools like SolarWinds and Wireshark. Perform capacity planning and recommend optimizations to improve throughput and reduce latency.

Security & Compliance:

• Ensure security best practices for both Cisco and F5 systems, including encryption (SSL, TLS), 802.1X, and access control. Stay current with emerging threats and implement necessary patches.
• Work with cross‑functional teams (network, security, application) to design and deploy solutions. Document network designs, F5 configurations, and troubleshooting procedures. Lead post‑incident analyses and provide training for junior engineers.

Required Skills & Experience:

• ARUBA
• Cisco Networking: 8-12 years of experience with Cisco networking (LAN switches, routers, wireless), with expertise in Layer 2/Layer 3 protocols and network design principles.
• F5 BIG‑IP Expertise: Extensive experience with F5 BIG‑IP devices (LTM, GTM, APM), including load balancing, SSL offloading, iRules, and troubleshooting.
• Tools & Monitoring: Proficiency with network monitoring tools (e.g., SolarWinds, Wireshark), and experience with network automation (e.g., Python, Ansible).
• Certifications: Cisco CCNP/CCIE, F5 Certified Administrator, or F5 Certified BIG‑IP Specialist; security certifications (e.g., CISSP) are a plus.
• Soft Skills: Strong analytical and problem‑solving skills, excellent communication, and the ability to work independently in a fast‑paced environment.