OT Security Professional
We are seeking an accomplished OT Security Professional to join our team. The role is centered around hands-on engineering, design, and troubleshooting across controllers, machinery, and security controls.
* Key Responsibilities:
* Create, refine, and validate security controls across OT networks and production platforms.
* Design and optimize segmentation boundaries, zoning layouts, and routing patterns.
* Develop and maintain firewall rule sets, ACL structures, and traffic pathways between operational layers.
* Lead equipment onboarding-interface mapping, communication validation, and control-plane behaviour checks.
* Create and maintain baseline configurations for switches, controllers, edge devices, and monitoring points.
* Analyse system behaviour, cross-talk, and unexpected signalling patterns during change windows.
* Implement and validate security controls with minimal performance impact on production systems.
* Perform incident triage: packet inspection, log correlation, device state review, rollback reasoning.
* Contribute to internal architecture reviews and maintain technical design notes, diagrams, and configuration references.
* Work with external partners to align environments, validate remediation plans, and verify technical changes.
* Strengthen observability-logging routes, telemetry capture, and health-state indicators for OT assets.
Requirements & Experience
* 5+ years in OT network engineering, ICS/SCADA systems, or industrial networking environments.
* A strong understanding of segmentation, VLAN layouts, protocol behaviour, and controller communication paths.
* Experience configuring and maintaining firewalls and L2/L3 network equipment in production.
* Familiarity with frameworks such as NIST 800-82 or IEC 62443 applied in operational engineering scenarios.
* The ability to interpret traffic flows, protocol anomalies, and equipment state transitions.
* Hands-on experience with packet analysers, vulnerability scanners, endpoint controls, and configuration management tools.
* A comfort level operating in controlled, regulated, or compliance-bound industrial environments.
* A clear, structured documentation style-baseline diagrams, change notes, configuration references.
* Experience performing technical root-cause investigations and contributing to OT security improvement plans.