Architecture Reseau et Securité F/H

Make an impact with NTT DATA Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it's a place where you can grow, belong and thrive. Architecture Reseau et Seurité L4 Concevoir des architectures réseau et sécurité complexes (LAN, WAN, DC, SD-WAN, Sécurité) Rédiger et maintenir la documentation HLD / LLD (design, matrices de flux, schémas, procédures) Participer aux choix technologiques et aux revues d'architecture Réaliser des audits d'infrastructures et proposer des plans d'amélioration Implémentation & Déploiement Déployer et intégrer des solutions réseau et sécurité de bout en bout Piloter des projets techniques à forte valeur ajoutée (multi-sites, environnements critiques) Assurer l'intégration avec les environnements existants (on‑prem, hybride, cloud) Exploitation & Expertise Intervenir en support N3/N4 sur des incidents complexes Être le point d'escalade technique pour les équipes opérationnelles Garantir la disponibilité, la performance et la sécurité des infrastructures Sécurité & Conformité Définir et implémenter les politiques de sécurité réseau Gérer les flux, VPN, règles de sécurité et mécanismes de segmentation Contribuer aux démarches de sécurité by design Avant-vente & Conseil (selon contexte) Support aux équipes avant-vente (RFP/RFI, soutenances techniques) Participation aux comités techniques clients Rôle de conseiller expert auprès des clients stratégiques Compétences techniques requises Réseau Architectures LAN / WAN / Datacenter SD-WAN (design, déploiement, exploitation) Routage avancé : BGP, OSPF Haute disponibilité, redondance, QoS Sécurité Palo Alto Networks (firewalls, politiques de sécurité, VPN) Segmentation réseau, filtrage, sécurisation des flux Intégration sécurité dans les architectures globales Load Balancing F5 BIG-IP LTM Virtual Servers, Pools, iRules (niveau avancé) Haute disponibilité et performances applicatives Solutions & Outils Cisco Catalyst Center (DNA Center) Automatisation, assurance réseau, gestion du lifecycle Environnements hybrides et multi‑sites Certifications Nécéssaire: CCIE Appréciés: Palo Alto (PCNSE) F5 LTM Certified (CA/CTS) Cisco complémentaires (SD-WAN, Security) Profil recherché Ingénieur diplômé (Bac+5 ou équivalent) Expérience significative (8–10 ans minimum) en réseaux & sécurité Capacité à travailler sur des environnements critiques et complexes Forte capacité d'analyse, d'autonomie et de prise de décision Excellentes compétences rédactionnelles (documents d'architecture) Français courant, anglais professionnel requis Soft Skills Leadership technique et rôle de mentor Sens du service client et posture de consultant Capacité à vulgariser des sujets complexes Rigueur, méthode et esprit de synthèse Évolution possible Architecte Réseau & Sécurité Lead Technique / Référent d'offre Manager technique ou Practice Leader Workplace type: Hybrid Working About NTT DATA NTT DATA is a $30+ billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world's leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. Our consulting and industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 50 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is part of NTT Group, which invests over $3 billion each year in R&D. We are committed to providing an environment free of unfair discrimination and harassment. Join our growing global team and accelerate your career with us. Apply today. Third parties fraudulently posing as NTT DATA recruiters NTT DATA recruiters will never ask job seekers or candidates for payment or banking information during the recruitment process, for any reason. Please remain vigilant of third parties who may attempt to impersonate NTT DATA recruiters—whether in writing or by phone—in order to deceptively obtain personal data or money from you. All email communications from an NTT DATA recruiter will come from an @nttdata.com email address. If you suspect any fraudulent activity, please contact us. Is innovation part of your DNA? Do you want to enable a connected future for people, organizations, and society? Join our growing global NTT family and you'll be part of the world's largest ICT company (by revenue). We've combined the capabilities of 28 remarkable companies to become one, leading technology services provider. Together, we help our people, clients, and communities do great things with technology to create a more secure and connected future. We employ 40,000 people across 57 countries. By bringing together the world's best technology companies and emerging innovators, we work together to deliver sustainable outcomes to businesses and the world. Innovation is part of our DNA. We believe it's key to what makes us different. So, we strive to move forward, challenge the status quo, and drive excellence through the technologies we integrate and the services we deliver around the world. The result is connected cities, connected factories, connected healthcare, connected agriculture, connected conservation, connected mobility, and connected sport. Together we enable the connected future. You'll be joining a global employer that is committed to attracting, growing and keeping the best talent. A place where you will be at the heart of our success!