A proactive and detail-oriented OT Security Specialist with a strong analytical mindset and practical/hands-on experience in securing industrial environments. This professional excels at understanding and managing complex and legacy OT infrastructures, and is able to advocate efficient and transparent solutions ensuring they become secure.
With foundational expertise in OT network technologies and firewall configurations, this specialist can cooperate with other teams—such as operations, IT, and engineering—to assess risks, strengthen network segmentation, and maintain a resilient OT security posture.
Key Strengths:
In-depth knowledge of OT security and networking in industrial environments (e.g., SCADA, PLCs, DCS)
Skilled in analyzing and mapping complex or legacy OT networks
Handson experience with segmentation and IP (re-)numbering of OT networks
Experienced with risk assessments and developing mitigation strategies
Practical understanding of firewalls, network segmentation, and secure architecture principles
Understanding of the Purdue model




Hands-on experience in implementation of at least one of the following technologies (OT-firewalling, automated network monitoring, network restructuring)
Proficient in continuous monitoring using SNMP, NetFlow, or similar protocols
Works cross-functionally with IT/OT teams to align security with production needs
Knowledge of Fortinet firewalls configuration
Experience with Active Directory (AD) management
Hands-on experience with Nozomi Networks solutions (e.g., Guardian) for network traffic analysis, anomaly detection, and asset visibility in industrial/OT environments is a plus
Cisco certificate is a plus
Palo Alto firewall configuration is a plus
Communication & Client Engagement
Strong verbal and written communication skills, able to translate complex OT security concepts into clear, business-relevant language for both technical and non-technical stakeholders.
Proactive in client meetings, takes initiative during commiss

📌 OT Security Engineer (Alcobendas)
🏢 QUARIQ
📍 Alcobendas