Senior OT/ICS Security Engineer — Industrial Cyber Specialist

Infinity Quest Limited; Polska; On-site; PLN 120,000 - 200,000; Full time

Job summary

Infinity Quest Limited is seeking an experienced OT/ICS cybersecurity expert with 5+ years in industrial security to lead network segmentation, firewalling, and asset visibility across multi-site OT environments. You will implement OT/IIoT protocols (Modbus, DNP3, OPC/OPC-UA, Profinet, MQTT) and strengthen incident response, risk assessment, and patch management per IEC 62443, NIST SP 800-82, ISO 27001.

Experience with Fortinet, Palo Alto, Cisco, Nozomi, Claroty, Forescout, Axonius and Tenable

Qualifications

• 5+ years OT/ICS cybersecurity experience.
• Experience in industrial network security.
• Knowledge of OT network segmentation and firewalling.
• Familiarity with OT/IIoT protocols (Modbus, DNP3, OPC/OPC-UA, Profinet, MQTT).
• Understanding of IEC 62443, NIST SP 800-82, ISO 27001.

Skills

OT segmentation

OT firewalling

Asset visibility

OT protocols

Incident response

Risk assessment

Patch management

IEC 62443

NIST SP 800-82

ISO 27001

OT/IIoT protocols

Tools

Nozomi

Claroty

Forescout

Axonius

Tenable

Fortinet

Palo Alto

Cisco

Job description

Infinity Quest Limited is seeking an experienced OT/ICS cybersecurity expert with 5+ years in industrial security to lead network segmentation, firewalling, and asset visibility across multi-site OT environments. You will implement OT/IIoT protocols (Modbus, DNP3, OPC/OPC-UA, Profinet, MQTT) and strengthen incident response, risk assessment, and patch management per IEC 62443, NIST SP 800-82, ISO 27001.

Experience with Fortinet, Palo Alto, Cisco, Nozomi, Claroty, Forescout, Axonius and Tenable