Network and security L2, Puteaux

Overview Lynxeo, formerly part of the Nexans Group, specializes in designing and manufacturing cables and technology solutions for global industrial leaders. The company operates 20 sites across multiple continents with a global workforce and aims to accelerate sustainable energy, mobility, and industrial digitalization. Within this position, you will be part of the Global IT Infrastructure Center of Excellence within Lynxeo IS, managing IT infrastructure globally and collaborating with Hosting/Platform/Cloud, application, and regional teams. Location: Tour Hekla - La Défense, Paris. Supervisor: Head of Global Infrastructure. Type: CDI. Time: Full time.

Responsibilities

Resolve service problems by performing Root Cause Analysis (RCA) and designing action plans for unknown errors reported through the Problem Management Dashboard

Perform solution releases by authorizing, validating (changes, upgrades, updates, patches, and migrations), and implementing them

Act as the L2 level function and manage communication with vendors in case of problems, patches, and maintenance

Ensure to keep the SMBD up to date by adding/modifying CI as implied by incidents, changes, and release processes

Perform technical and management escalations as implied by the escalation process to ensure network and security tasks are progressing toward resolution and/or completion

Provide second line support and escalation of helpdesk tickets to users, working to SLA requirements

Provide remote support and change management assistance to the user base on an 8x5 basis as required

Keep users updated on issue status and maintain high user satisfaction

Support typical services: LAN, WAN, IT/OT firewalls, infra as code, firewall rules automation

Implement standard, complex, urgent Changes and integrate Changes in the ticketing tool

Plan Changes (implementation chronograms) and participate in Change Advisory Board (CAB) meetings

Implement Changes in Business Hours (BH) and Non-Business Hours (NBH)

Update technical reference documents and databases (Diagrams, operating procedures, CMDB, etc.)

Contribute to security processes/workflows (e.g., firewall rules)

Handle routine production tasks (checks, inventory, monitoring, backup, maintenance)

Incident/crisis management and writing of incident reports and root-cause analysis

Contribute to sustainable solutions—technical and CSR-oriented

Ensure the CMDB is up to date

Network monitoring activities via corporate monitoring tool

Qualifications

More than 5 years' experience

Experience in international, multi-site and multi-cultural environments

Good knowledge of Agile principles

Proven ability to learn on the job

Strong team spirit

Fluent English

Advanced knowledge of Cisco (Switching and Meraki); CCNA and CCNP appreciated

Advanced knowledge of Fortinet (Fortigate, Fortimanager, Fortinanalyzer, Forti authenticator, EMS)

Knowledge in Network as Code / automation / scripting (Ansible, Terraform, Python or other)

Preferred

Solid understanding of networking technologies (LAN/WAN, routing, switching, IP sub-netting) and knowledge of the 7-layer OSI model

Advanced knowledge of Zscaler (ZIA, ZPA, Cloud firewall) or similar technologies

Advanced knowledge of Forcepoint (SD-WAN)

Hands-on experience in Network as Code / automation / scripting

Industry context and OT knowledge is a plus; the candidate's mindset is more important and can be developed on the job

Soft Skills

Analytical and problem-solving skills

Creative, solution-oriented, and pragmatic

Clear and concise communication, both oral and written

Curiosity, integrity, discernment, and respect for others

Collaborative and enjoyable to work with

At Lynxeo, we’re ready to electrify industry through customized cabling and connectivity solutions, supporting energy, data transmission, and automation needs. We value diversity as a driver of performance and our ambition to lead the energy transition toward a sustainable planet.

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