Security & Network Engineer (IT/OT)

About the role

CYRAF is expanding its team and seeks a Security & Network Engineer (IT/OT) to support critical infrastructure projects. The role combines network operations, security implementation and industrial‑control system expertise in a fast‑growing environment.

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 including VMware, QEMU and 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

• Bachelor’s to Master’s degree (Bac+2 to Bac+5) in networks, systems or cybersecurity.
• Strong interest in industrial cybersecurity and critical environments.
• Relevant certifications such as CCNA, CompTIA Network+ or Security+ are a plus.
• Experience with Windows Server and Active Directory environments is desirable.
• Familiarity with OT protocols (Modbus, Profinet, OPC) is advantageous.

Required skills

• TCP/IP, DNS, DHCP, VLAN, VPN, SSL/TLS, IPSec.
• LAN/WAN architecture, firewalls, high‑availability concepts.
• System and network security fundamentals.
• VMware, QEMU, Microsoft Azure.
• Active Directory, Group Policy Objects.
• IDS/IPS deployment and management.
• Industrial protocols: Modbus, Profinet, OPC.

What we offer

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