career
Lead impactful cybersecurity work in critical infrastructure with a skilled team
Join a major cybersecurity program as a Cyber Security Systems Engineer Lead - OT, securing critical operational technology (OT) systems. This role suits an experienced professional ready to lead security control design and integration in a complex environment.
You will oversee the integration of cybersecurity tools into OT systems, ensuring compliance and resilience across the asset lifecycle—from procurement to decommissioning. Working with engineers, vendors, and operations teams, you’ll deliver practical solutions that balance security and operational needs.
Key Responsibilities:
Design and implement security controls for OT systems, including ICS/SCADA, compatible with legacy environments.
Integrate tools like Nozomi Guardian or FortiNAC into OT/ICS systems.
Apply IEC 62443 zones/conduits and Purdue Model for secure architectures.
Turn compliance requirements into practical engineering solutions.
Configure OT firewalls, manage ACLs, and support field deployments.
Work cooperatively with teams to align on secure, practical outcomes.
Support OT incident response, threat hunting, and risk management.
Produce clear technical documentation, including network diagrams and plans.
What You Bring:
8+ years in OT, ICS, or industrial automation with cybersecurity experience.
Expertise in OT protocols (e.g., Modbus, DNP3, IEC 61850) and real-time systems.
Experience with tools like Nozomi or Fortinet in OT settings.
Knowledge of IEC 62443, Purdue Model, and zero-trust principles.
Tertiary qualifications in Engineering or IT; certifications like GICSP, CISSP, or SANS ICS410/515.
Strong communication to connect technical and operational teams.
Ability to manage flexible delivery in a busy environment.
At Randstad Digital, we are passionate about providing equal employment opportunities and embracing diversity to the benefit of all. We actively encourage applications from any background.
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