Technicien / Ingénieur Sécurité & Réseaux (IT/OT)

About the role

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. The role involves operating, administering and securing network and system infrastructures.

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 such as firewalls, VPNs, segmentation and 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 assistance.

Required profile

• 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.

Required skills

• TCP/IP
• DNS
• DHCP
• VLAN
• VPN
• SSL/TLS
• IPSec
• LAN/WAN
• Firewalls
• VMware
• QEMU
• Azure
• Active Directory
• GPO
• IDS/IPS
• Modbus
• Profinet
• OPC

What we offer

• 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.