Operational Technology (OT) Specialist at FrieslandCampina WAMCO Nigeria Plc

FrieslandCampina WAMCO Nigeria PLC is a unique multinational FMCG & B2B company aiming to stay successful in an ever-changing and increasingly complex world. We are unique because our suppliers, the farmers, are also our owners. Since we own the entire supply chain, from grass to glass, we can guarantee the high quality of all our products. As we work in highly competitive markets, we need to be agile while balancing all interdependencies inside and outside our company. Next to a supply-driven business, our portfolio consists of many strong commercial brands all over the world.

We are recruiting to fill the position below:

Job Title: Operational Technology (OT) Specialist

Location: Nigeria

Job Summary

• 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.

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.
• Assist with audits, compliance reviews, and project documentation

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

How to Apply
Interested and qualified candidates should:
Click here to apply

Application Deadline 12th September 2025.