EMEA OT Network SME: PLC/SCADA & Cybersecurity

Nscale; Dublin; Hybrid; EUR 90,000 - 120,000; Full time

Job summary

Nscale is seeking an OT Network Subject Matter Expert to design, deploy, validate, and operate highly available OT networks across its data centers. This role focuses on connecting PLC systems, field devices, and SCADA platforms with emphasis on resiliency, determinism, and secure operations.

The successful candidate will collaborate with Controls Engineers, SCADA SMEs, IT teams, system integrators, and commissioning teams to ensure robust OT networks, proper documentation, and adherence to

Qualifications

• Bachelor’s degree in Engineering, Computer Science, Information Technology, or related technical discipline, or equivalent practical experience.
• 5+ years of experience supporting industrial or OT networks in manufacturing, industrial, utilities, or mission‑critical environments.
• Strong understanding of industrial networking concepts including EtherNet/IP, managed switches, VLANs, routing and switching fundamentals, network segmentation, and redundancy design.
• Experience supporting PLC and SCADA environments and understanding how OT network design impacts system performance and availability.
• Familiarity with OT cybersecurity practices including segmentation, access control, patch coordination, and secure remote support.
• Experience supporting field testing, commissioning, and troubleshooting of industrial network infrastructure.

Responsibilities

• Support the design and review of OT network architectures including EtherNet/IP, VLAN segmentation, zone-based design, managed switches, firewall boundaries, and redundancy strategies appropriate for critical facilities.
• Validate OT network designs for resilience, determinism, maintainability, and elimination of single points of failure, including review of PRP, DLR, or equivalent redundancy topologies where applicable.
• Review vendor and integrator network designs, switch configurations, addressing plans, cabinet layouts, and documentation for compliance with Nscale OT design standards.
• Coordinate with cybersecurity teams to ensure OT network segmentation, remote access controls, firewall policies, authentication requirements, and secure operational practices are properly implemented.
• Participate in FAT, SAT, commissioning, and failover testing for OT network infrastructure, including switch redundancy, network recovery, and communications validation between PLC and SCADA layers.
• Support troubleshooting of OT network performance, configuration, or communications issues during deployment and live operations.
• Partner with SCADA, controls, and IT teams to ensure clean interfaces between the OT network, control system devices, and upstream monitoring platforms.
• Maintain network documentation including topology diagrams, VLAN and IP plans, firewall rules, redundancy diagrams, standards, and turnover records.

Skills

OT networking

EtherNet/IP

SCADA

VLANs

Redundancy design

Cybersecurity practices

Field testing

Troubleshooting

IP addressing

Education

Bachelor’s degree in Engineering, CS, IT, or related

Tools

Cisco Industrial

Stratix

Hirschmann

Industrial networking certifications

PRP/DLR knowledge

Job description

Nscale is seeking an OT Network Subject Matter Expert to design, deploy, validate, and operate highly available OT networks across its data centers. This role focuses on connecting PLC systems, field devices, and SCADA platforms with emphasis on resiliency, determinism, and secure operations.

The successful candidate will collaborate with Controls Engineers, SCADA SMEs, IT teams, system integrators, and commissioning teams to ensure robust OT networks, proper documentation, and adherence to