OT Network Engineer

About the Role

SAMREF Saudi Aramco Mobil Refinery Company Ltd. is seeking an OT Network Engineer to join their team in Yanbu Al Sinaiyah, Al Madinah, Saudi Arabia. This full-time role is critical for ensuring the secure, reliable, and continuous operation of the refinery’s Plant Automation Network (PAN) and associated Operational Technology (OT) cybersecurity controls. The position requires 2-5 years of experience and plays a vital role in protecting refinery operations from cyber threats, ensuring uninterrupted production, plant safety, and regulatory compliance.

Role Purpose and Context

The OT Network Engineer is responsible for maintaining the availability, integrity, and security of OT networks that support process control, safety systems, and overall plant operations. This includes adherence to applicable industry standards, corporate cybersecurity requirements, and audit obligations. The role ensures that cybersecurity controls are implemented effectively without compromising plant safety or operational continuity.

Key Responsibilities

• Administer, operate, and maintain the OT Plant Automation Network, including industrial switches, firewalls, and communication infrastructure for DCS, PLCs, SCADA, and SIS.
• Ensure high availability, performance, and reliability of OT networks supporting 24/7 plant operations.
• Maintain secure network segmentation and controlled connectivity between OT and external systems.
• Administer user and service accounts for OT systems, enforcing password control, privilege management, and segregation of duties.
• Implement and maintain OT cybersecurity controls such as logging, monitoring, antivirus, endpoint protection, vulnerability management, and baseline configuration control.
• Plan and execute scheduled OT antivirus updates and patching activities, coordinating to minimize production impact.
• Conduct OT cybersecurity risk assessments for new and existing systems and maintain accurate OT asset inventory and licensing records.
• Support internal and external OT cybersecurity assessments and audits, developing and tracking corrective action plans.
• Provide emergency call-out support for OT cybersecurity incidents and participate in investigations, containment, and recovery efforts.
• Manage and control OT firewalls, network access rules, and secure remote connectivity, monitoring network traffic for anomalies.

Qualifications and Experience

• 2-5 years of experience in OT network engineering or a related field.
• Demonstrated understanding of industrial control systems (DCS, PLCs, SCADA, SIS) and their network requirements.
• Familiarity with industry standards such as ISA/IEC 62443.
• Experience with network administration, firewall management, and cybersecurity controls implementation.

Work Environment

This is a full-time position based in Yanbu Al Sinaiyah, Al Madinah, Saudi Arabia, within a critical refinery operation environment. The role involves supporting 24/7 plant operations and responding to cybersecurity incidents as part of an on-call schedule.

Application Process

Interested candidates are encouraged to apply. Salary details will be discussed during the interview process.