Operational Technology (OT) Specialist at FrieslandCampina

About the job

We are looking for a highly capable and hands-on Operational Technology (OT) Specialist to support and manage complex OT networks, field-level control systems, and secure industrial infrastructure.

• The successful candidate will have a deep understanding of OT equipment communication, Layer 0 controls (such as CCTV and access systems), Cisco switch administration, and virtualized server environments. This position requires a technically sound professional who can bridge IT-OT gaps while ensuring system reliability, performance, and security across industrial environments.

What We Ask

• HND/Bachelor of Science in Computer Science (required)
• Additional certifications in OT/ICS, networking, or security are highly desirable.

Experience:

• 3 - 5 years’ experience in OT/ICS, network engineering, or industrial systems administration.
• Experience working in critical infrastructure sectors such as manufacturing, utilities, energy, or oil & gas.

Technical Competencies:

• Strong working knowledge of Cisco switches and CLI (Catalyst 9000, IE series).
• Understanding of field-level communication between OT devices and industrial control systems.
• Proficient in VMware and server OS administration (Windows Server, Linux).
• Familiar with SCADA/HMI platforms (e.g., Siemens WinCC, Wonderware, GE iFIX).

Preferred Certifications:

• Cisco CCNA/CCNP (Industrial or Enterprise)
• GICSP, CompTIA Security+, or ISA/IEC 62443
• VMware Certified Professional (VCP)

Soft Skills:

• Strong troubleshooting and analytical skills
• Excellent communication and documentation abilities
• Ability to work independently and collaboratively across OT and IT teams

What We Offer

• A dynamic, challenging, and innovative work environment.
• We believe in nourishing growth and offer training and personal development.
• Competitive remuneration package

Vacancy Description

The role will be responsible for the following:

• OT Network & Cisco Infrastructure Management
• Configure and maintain OT network infrastructure using Cisco switches (Catalyst and IE series), routers, and industrial firewalls.
• Implement Layer 2/3 protocols, VLANs, ACLs, QoS, and segmentation to meet real-time operational demands.
• Monitor network health and performance, perform diagnostics, and lead incident resolution for communication failures.
• Layer 0 Controls & Physical Security Systems
• Manage CCTV systems, badge-based access control, interlocks, alarms, and safety devices.
• Ensure that physical systems are securely integrated with OT and ICS platforms.
• OT Protocols & Industrial Equipment Communication
• Understand and manage communications between OT equipment, such as PLCs, RTUs, HMIs, VFDs, and SCADA/DCS systems.
• Configure and support industrial protocols like Modbus (TCP/RTU), OPC UA, BACnet, DNP3, Ethernet/IP, Profibus, and others.
• Diagnose communication failures between field devices and control systems and optimize data flow for efficiency and stability.
• Server & Virtualization Management
• Deploy and maintain Windows and Linux servers that host OT applications and SCADA/HMI platforms.
• Manage VMware vSphere/ESXi for hosting OT virtual machines, ensuring high availability and secure configuration.
• Perform backup and disaster recovery processes for OT systems.
• Cybersecurity & Standards Compliance
• Apply security practices aligned with IEC 62443, NIST 800-82, and corporate cybersecurity frameworks.
• Support segmentation, monitoring, and endpoint protection within OT zones.
• Collaborate with IT and InfoSec teams for secure remote access, vulnerability remediation, and incident response.
• Documentation & Reporting
• Maintain detailed network schematics, device configurations, system logs, and change management records.
• Provide regular reports on system status, security posture, and recommended improvements.