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# OT/ICS Cyber Security Architect

- **Company:** IBEX RECRUITMENT LTD
- **Location:** UK
- **Contract:** Permanent contract
- **Skills:** Cyber Security, Ethernet, Modbus, Network Segmentation, Process Control Systems, Operational Systems
- **Published:** September 10, 2026
- **Apply:** https://www.totaljobs.com/job/cyber-security-architect/ibex-recruitment-ltd-job107964763

## About the Role

* 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.

We welcome candidates from any industry with relevant OT/ICS experience - energy, utilities, manufacturing, transport, defence, or other industrial sectors.

## Description

We're working with a large organisation undergoing significant cyber and digital transformation to hire a Cyber Security Architect focused on Operational Technology (OT).

This role sits within a dedicated Security Architecture function and is specifically aligned to securing industrial and operational systems. The focus is on designing and assuring cyber security controls across complex OT environments, ensuring operational resilience, regulatory alignment, and risk mitigation from the outset.

This is not an enterprise IT architecture role - it is centred on industrial control systems, operational networks, and IT/OT convergence.

What you'll do

 * 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.


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