Description de l'entreprise Company Description Scalian is a multinational engineering consulting firm with over 35 years of experience and nearly 5,500 specialists across 11 countries. We provide expertise in Operations & Technology and Information Technology to a variety of industries, including aerospace, defense, railways, and energy, supporting their development. At Scalian, people are at the heart of our priorities. By joining us, you will have the opportunity to achieve your professional goals in a collaborative and supportive environment. Description du poste Context As part of the continuous evolution of the Scalian Group’s IT infrastructure, we are recruiting a Network Administrator to support the Network Expert manager to design, deployment, and operational management of the Group’s network infrastructures (France & International). The position is strongly operations-oriented, with an emphasis on maintaining and evolving network services while ensuring performance and security across multi-site environments. Reporting line • Reports to the Group IT Infrastructure Manager • Within the Group IT Infrastructure team Main responsibilities Network operations & administration - Ensure run (MCO) of network infrastructures (LAN, WAN, SD-WAN, Wifi, ToIP) - Manage lifecycle of network equipment (Switch, Firewall and Wi-FI) - Configure and integrate network equipment (Switch, Firewall and Wi-FI) - Maintain and update the network asset inventory - Implement and maintain monitoring solutions - Handle advanced incidents and troubleshooting - Manage public DNS and certificate Network engineering & projects - Design and implement network architecture evolution projects - Support business and application teams in infrastructure deployment - Participate in the industrialization of infrastructures - Integrate new sites or entities into the corporate network Security & compliance (network scope) - Ensure network security posture (firewalls, VPN, segmentation) - Apply and enforce Group security policies - Monitor CVEs and deploy patches on network equipment - Manage VPN solutions (IPSec, SSL) Documentation & continuous improvement - Maintain up-to-date technical documentation - Participate in process improvement and standardization - Define best practices and contribute to infrastructure guidelines Qualifications Expected technical skills Good understanding of environments: Systems: ▪ Windows server (NPS) Networks: ▪ VPN SSL, VPN IPSEC ▪ Firewall Stormshield and Fortinet ▪ Switch Cisco, Huawei and Fortinet ▪ Wi-fi: Aruba Instant + Airwave and Fortinet ▪ Routing ▪ DHCP, DNS, IPAM ▪ Monitoring tools (e.g. SolarWinds) ▪ SD-WAN Nice to have : - Standards: ISO 27001 / TISAX - Zscaler ZIA and ZPA - Wallix PAM Soft skills - Analytical mindset - Teamwork and collaboration - Communication with technical and non-technical stakeholders - Autonomy and rigor Languages - Professional English