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 10 week of 2026