FrieslandCampina WAMCO Nigeria PLC is a multinational manufacturing company: it is an affiliate of Royal FrieslandCampina of The Netherlands, the world’s largest dairy cooperative. Its headquarters is in the Ikeja industrial area of Lagos State and operates an extensive distribution network across Nigeria’s 36 states and the Federal Capital Territory.
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.
Method of Application
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