OT Cyber Security Architect

Occasional UK client travel

We are recruiting an OT Cyber Security Architect for a growing organisation operating across energy, metering and critical infrastructure.

This is a hands-on, customer-facing architecture role. You will help customers understand their OT security needs, design practical solutions across IT and OT environments, and support those designs through implementation.

• Lead OT security architecture across customer projects
• Turn customer needs into clear security requirements
• Design secure IT/OT interfaces, networks and data flows
• Apply ISA/IEC 62443 to segmentation, zones and conduits
• Produce architecture diagrams and design documentation
• Support implementation, testing and handover
• Review supplier and engineering designs
• Contribute to risk assessments, FAT and SAT
• Help develop OT security standards and reusable designs

• Experience designing security solutions for OT, ICSE or SCADA environments
• Practical ISA/IEC 62443 knowledge
• Strong understanding of IT/OT integration and the Purdue Model
• Experience supporting designs through implementation
• Confidence leading customer workshops and technical discussions
• The ability to balance security with operational availability and resilience

Experience in energy, utilities, metering, systems integration or critical infrastructure would be particularly relevant.

Knowledge of NCSC CAF, NIS, NIST SP 800-82, OT monitoring, vulnerability management or embedded-device security would be beneficial, but you do not need every item to apply.

• Salary up to £85,000
• Genuine ownership of customer-facing OT security architecture
• Exposure to energy, metering and critical infrastructure projects
• Hybrid working with two days per week in Rochester
• Client travel typically less than once per month
• Pension and wellbeing benefits
• Training and qualification support