Network and security L2

Lynxeo; Puteaux; On-site; EUR 55,000 - 75,000; Full time

Job summary

A global technology solution provider in Île-de-France seeks an IT Infrastructure Manager to oversee global IT infrastructure and collaborate with various teams. The ideal candidate has over 5 years of experience, strong technical knowledge in Cisco and Fortinet, and excellent English communication skills. This full-time role offers a dynamic work environment focusing on sustainable solutions.

Qualifications

• More than 5 years' experience in IT infrastructure management.
• Experience in international, multi-site environments.
• Strong team spirit and ability to learn on the job.

Responsibilities

• Resolve service problems through Root Cause Analysis.
• Perform solution releases, including authorizing changes.
• Manage communication with vendors regarding issues and patches.

Skills

Root Cause Analysis

Agile Principles

English

Cisco Knowledge

Network Automation

Tools

Ansible

Terraform

Python

Fortinet

Zscaler

Job description

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.