OT/ICS Cyber Security Architect

Salary: £40,000 - 70,000 per year

Requirements

• Proven experience securing Operational Technology (OT) or Industrial Control Systems (ICS) environments
• Strong understanding of IT/OT convergence and securing legacy or brownfield industrial estates
• Knowledge of recognised OT security standards such as IEC 62443 (ISA-99), NIST SP 800-82, and application of the Purdue Model
• Experience designing secure segmentation models (zones and conduits), industrial firewalls, and secure remote access solutions
• Familiarity with industrial protocols such as Modbus, DNP3, Ethernet/IP, OPC/UA, and associated security risks
• Experience operating in regulated, safety-critical, or high-availability environments
• Ability to translate technical risk into clear architectural decisions for engineering and operational audiences

Responsibilities

• Define and implement security architecture principles across OT / ICS environments
• Embed secure-by-design controls into industrial systems and operational technology platforms
• Lead design assurance across OT network segmentation, zone and conduit modelling, and industrial DMZ architectures
• Identify architectural gaps within existing OT estates and define pragmatic remediation roadmaps
• Align OT security architecture to recognised frameworks and regulatory requirements
• Collaborate with OT engineers, operational stakeholders, and cyber teams to balance safety, availability, and security
• Provide architectural guidance across IT/OT convergence programmes

Technologies

• Architect
• Ethernet
• Network
• Security

More

We are a large organization undergoing significant cyber and digital transformation and are seeking a Cyber Security Architect focused on Operational Technology (OT). This strategic, high-impact role centers on securing industrial control systems and operational networks, ensuring operational resilience and risk mitigation. We offer 30 days holiday plus bank holidays, flexible leave options, family-friendly policies, and a generous employer pension contribution. This permanent position is based in the North West of England, and we welcome candidates from any industry with relevant OT/ICS experience.

last updated 14 week of 2026