Operational Technology (OT) Architect
The Role: OT Architect
Position Type: Contract Inside IR35
Remote work option Available: Remote
Job Description:
SKILLS/COMPETENCIES Essential
Deep, real-world OT/ICS architecture experience within industrial, manufacturing, utilities, or critical infrastructure environments.
Proven experience acting as a technical design authority or lead architect for OT networks, security architecture, and operational resilience programmes.
Strong understanding of IT/OT convergence, architectural integration patterns, and associated risk.
Expert working knowledge of IEC 62443, including zone/conduit modelling, and its practical application in target-state OT architecture design.
Practical understanding of industrial protocols (eg, Modbus, DNP3, OPC-UA, Profinet) and their architectural implications for segmentation and secure design.
Experience defining and owning reference architectures, technical standards, and design principles across large-scale OT/critical infrastructure estates.
Strong OT risk management capability, with the ability to translate threat and risk assessments into architectural decisions and mitigation designs.
Experience working with, and providing technical governance over, integrators, OEM vendors, and engineering partners.
Familiarity with enterprise architecture frameworks/practices (eg, TOGAF, SABSA) and experience presenting designs to architecture review boards or senior technical governance forums is advantageous.
Desirable
Experience within a large global, regulated or systemically important organisation.
Experience across multiple OT environments, building types, regions or operating models.
Knowledge of building management systems, physical access control, CCTV, fire and life-safety systems, energy management, environmental monitoring or data centre operational systems.
Experience with OT asset visibility, cyber-physical systems platforms, network monitoring or security monitoring technologies.
Understanding of enterprise architecture frameworks and architecture governance processes.
Knowledge of relevant standards and guidance such as NIST Cybersecurity Framework, NIST SP 800-82, ISO/IEC 27001, NIS2 or sector-specific regulatory requirements.
Experience designing for Legacy systems, long equipment life cycles, constrained maintenance windows and high availability environments.
Experience supporting procurement, commercial evaluation, technical due diligence or supplier assurance.
Relevant architecture, cyber security, networking, engineering or IEC 62443 qualifications.