Technicien / Ingénieur Sécurité & Réseaux (IT/OT)

As part of its growth, CYRAF is recruiting profiles ranging from experienced Network Technician to Security & Networks Engineer, to work on IT/OT cybersecurity and critical infrastructure projects.

Key Responsibilities

• Operate, administer and secure network and system infrastructures.
• Participate in the design and evolution of secure IT/OT architectures.
• Deploy and maintain network security solutions (firewall, VPN, segmentation, IDS/IPS).
• Administer virtualized environments (VMware, QEMU, Azure).
• Automate provisioning and service management (Active Directory, DNS, DHCP, GPO, antivirus, security event management).
• Contribute to migration, modernization and automation projects.
• Provide technical support, documentation and customer support.

• Bac+2 to Bac+5 degree in networks, systems or cybersecurity.
• Strong network fundamentals: TCP/IP, DNS, DHCP, VLAN, VPN, SSL/TLS, IPSec.
• Good understanding of LAN/WAN architectures, firewalls and high availability.
• Knowledge of system and network security.
• Strong interest in industrial cybersecurity and critical environments.
• Rigor, autonomy, teamwork spirit and technical curiosity.

• Experience with Windows Server / Active Directory environments.
• Network or security certifications (CCNA, CompTIA Network+, Security+).
• Knowledge of OT environments and industrial protocols (Modbus, Profinet, OPC).

• High-impact projects on sensitive infrastructures.
• Skills development path from technician to engineer.
• Demanding and structured technical environment.
• End-to-end vision: network, security, risk and industrialization.