OT Security Engineer (Fortinet)

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OT Security Engineer | SysteCom, member of QnR Group

Role overview

We are seeking a hands-on OT Security Engineer with strong Fortinet and networking expertise to design, implement, secure, and support critical operational technology infrastructure and industrial networks.
The role is ideal for professionals who enjoy a combination of technical implementation, troubleshooting, support, and infrastructure security within mission-critical environments.

About QnR Group

QnR Group is a technology group with 35 years of experience, 8 companies, 4 delivery centers and 210+ professionals across Greece, Belgium, Cyprus and Poland. Listed on the Athens Stock Exchange since 2000, we deliver mission-critical digital transformation projects for the public and private sector. The Group’s capabilities covers software engineering, enterprise and generative AI, cybersecurity, cloud infrastructure, SAP and ServiceNow solutions, core banking and maritime intelligence.

About SysteCom

SysteCom, a member of QnR Group, specializes in cybersecurity, digital resilience and IT infrastructure. The company delivers solutions and services that help organizations protect their systems and data, strengthen operational continuity and modernize their technology environments. Bringing together security and infrastructure expertise, SysteCom supports businesses across sectors in building secure, reliable and resilient digital operations.

Requirements

What you'll work on:

• Deploy, configure, and maintain FortiGate and related Fortinet security solutions
• Design and implement secure network architectures for OT and industrial environments
• Manage IT/OT network segmentation and secure connectivity between operational sites
• Configure VPNs, firewall policies, routing, and security controls
• Monitor, troubleshoot, and resolve network and security incidents
• Perform security hardening, vulnerability remediation, and configuration reviews
• Support OT cybersecurity projects, upgrades, and infrastructure deployments
• Develop technical documentation, implementation guides, and network diagrams
• Work with field engineers, vendors, and operational teams to ensure service availability and security
• Participate in technical assessments, testing, and continuous improvement initiatives

What you bring:

• 3+ years of experience in Network Security, Cybersecurity, or Infrastructure Engineering
• Hands-on experience with Fortinet security solutions, particularly FortiGate
• Strong understanding of: Routing & Switching, TCP/IP Networking, VPN Technologies, Firewall Administration, Network Segmentation
• Experience implementing and supporting enterprise or industrial network environments
• Strong troubleshooting and analytical skills
• Ability to review and produce technical specifications and documentation
• Strong communication and stakeholder management skills

Desirable certifications: GICSP (Global Industrial Cyber Security Professional), ISA/IEC 62443 Certifications, Nozomi / Claroty, Fortinet / Palo Alto (ΟΤ Security), CCNA / CCNP (Routing & Switching).

Nice to have:

• Experience in OT, Utilities, Energy, Industrial, or Critical Infrastructure environments
• Experience with monitoring, logging, and security management platforms
• Understanding of OT cybersecurity principles and best practices
• Experience working in regulated environments