Senior OT Security Engineer

Prosecureme; Riyadh; On-site; SAR 260,000 - 480,000; Full time

Job summary

Prosecureme is seeking an experienced Senior OT Security Engineer with 8+ years of cybersecurity, including 5+ years in OT/ICS security, to lead security architecture for industrial environments in Riyadh. The role covers Purdue-based architecture, IEC 62443, and NIST SP 800-82 compliance.

You will design OT security architectures, deploy Fortinet and Palo Alto platforms, assess PLCs and OT networks, and collaborate with engineering IT and operations to strengthen protections across critical

Qualifications

• 8+ years of cybersecurity experience with at least 5 years in OT/ICS security.
• Hands-on OT/ICS security architecture experience.
• Practical experience with Fortinet and Palo Alto Networks solutions.
• Strong knowledge of IC S/SCADA architecture, PLCs, and industrial protocols.
• Experience with IEC 62443 and NIST SP 800-82 security standards.

Responsibilities

• Design and implement OT security architectures and network segmentation.
• Deploy and manage Fortinet and Palo Alto security platforms.
• Configure and support Nozomi Networks, Hirschmann, Microsens, Claroty, Dragos, TXOne solutions.
• Secure IC S/SCADA environments and industrial protocols (Modbus, DNP3, OPC UA, PROFINET).
• Assess PLCs and industrial networks; apply Purdue reference architecture.
• Conduct OT security assessments, vulnerability management, and incident response.
• Develop OT security policies and hardening standards aligned with IEC 62443 & NIST.

Skills

OT/ICS security

OT security architecture

IC S/SCADA knowledge

Purdue architecture

IEC 62443/NIST SP 800-82

Incident response

Vulnerability management

Tools

Fortinet

Palo Alto Networks

Nozomi Networks

Hirschmann

Microsens

Claroty

Dragos

TXOne

Job description

We are looking for an experienced Senior OT Security Engineer with 8+ years of experience, including strong expertise in OT/ICS security. The ideal candidate will have hands-on experience in OT security architecture, IC S/SCADA environments, network segmentation, and leading OT security solutions and assessments.

Responsibilities:

• Design and implement OT security architectures, network segmentation, and Industrial DMZ solutions.
• Deploy and manage Fortinet and Palo Alto Networks security platforms.
• Configure and support Nozomi Networks, Hirschmann, Microsens, Claroty, Dragos, and TXOne solutions.
• Secure IC S/SCADA environments and industrial protocols including Modbus, DNP3, OPC UA, and PROFINET.
• Assess and secure PLCs, industrial networks, and control systems based on the Purdue Enterprise Reference Architecture.
• Conduct OT security assessments, vulnerability management, remediation, incident response, and root cause analysis.
• Develop OT security policies, hardening standards, and operational procedures aligned with IEC 62443 and NIST SP 800-82.
• Implement and support firewalls, VPNs, NAC, Zero Trust, SIEM, and OT monitoring solutions.
• Work with engineering, IT, and operations teams to strengthen the security of industrial environments.

Requirements:

• 8+ years of cybersecurity experience, including at least 5 years in OT/ICS security.
• Strong hands-on experience with OT/ICS security architecture and technologies.
• Practical experience with Fortinet and Palo Alto Networks solutions.
• Strong knowledge of IC S/SCADA architecture, PLCs, industrial protocols, and Purdue architecture.
• Experience with OT security standards including IEC 62443 and NIST SP 800-82.
• Strong troubleshooting, analytical, incident response, and problem-solving skills.
• Experience in Oil & Gas, Utilities, Manufacturing, Energy, or Critical Infrastructure is preferred.

Preferred Certifications:

• Fortinet FCSS / NSE
• Palo Alto Networks PCNSE
• Nozomi Networks NCE
• GICSP
• ISA/IEC 62443