OT Enterprise Solutions Engineer

Salary: £137,500 - 137,500 per year

Requirements

• We need strong practical knowledge of IEC 62443.
• We need experience developing OT architecture, reference patterns and design decisions.
• We need the ability to translate complex requirements and competing stakeholder perspectives into practical, deliverable architecture.
• We need experience working across security, network, infrastructure, engineering, technology operations and related domains.
• We need the ability to produce clear architecture principles, reference architectures, standards, guardrails and decision records.
• We need the ability to define architectural boundaries and integration points between IT, OT, IoT, edge, cloud and cyber-physical environments.
• We need the ability to apply enterprise IT standards appropriately within OT operating conditions.
• We need the ability to work within architecture governance and Technical Design Authority processes.
• We need the ability to document current-state, transition-state and future-state architectures.
• We need the ability to assess architecture decisions against availability, safety, resilience, security, maintainability and business requirements.

Responsibilities

• We own the consolidation, development, articulation and ongoing evolution of our future-state Operational Technology architecture.
• We act as the lead OT architecture subject-matter expert within our architecture governance and Technical Design Authority processes.
• We bring together requirements and expertise from security, network, infrastructure, real estate services, engineering, technology operations and other relevant domains into a coherent enterprise architecture.
• We rapidly translate complex requirements and strategic objectives into clearly documented architecture decisions, principles, patterns and designs.
• We serve as the named accountable architecture lead for the OT domain, retaining end-to-end ownership of architecture completeness, integration and realism.
• We partner with Real Estate Services on our enterprise OT architecture vision, strategy and future-state architecture.
• We establish a common architectural direction across OT, IT and cyber-physical environments.
• We define how OT systems, networks, platforms, applications, devices, data and supporting services should operate together.
• We ensure that architectural decisions consider operational availability, safety, resilience, security, maintainability and business requirements.
• We act as the primary architecture authority for OT-related initiatives, designs and technology decisions.
• We develop and maintain key architecture deliverables, including current-state, transition-state and future-state architectures.
• We produce architecture principles, reference architectures, design patterns, standards, guardrails and decision records.
• We develop architecture views for technical specialists, programme teams, senior management and operational stakeholders.
• We define architectural requirements for connected, isolated, legacy, modernised and hybrid OT environments.
• We define appropriate architectural boundaries and integration points between IT, OT, IoT, edge, cloud and cyber-physical environments.
• We identify where IT and OT capabilities can safely converge and where separation, segregation or specialist controls are required.
• We define how enterprise services such as identity, network connectivity, observability, remote access, vulnerability management, backup, logging and incident management should be applied within OT environments.
• We work with security architects and assurance teams to ensure cybersecurity requirements are incorporated into the end-to-end OT architecture.
• We translate specialist security requirements into practical OT design considerations, including zones and conduits, trust boundaries, segmentation, identity, remote access, observability, resilience and system lifecycle requirements.
• We ensure security controls are proportionate, technically feasible and compatible with operational availability, safety, legacy technology and support constraints.
• We identify and resolve conflicts or dependencies between security requirements and the wider network, infrastructure, engineering and operational architecture.
• We document security-related architecture assumptions, decisions, risks, exceptions and dependencies.
• We challenge requirements that are unsuitable for OT environments while maintaining legitimate security outcomes.

Technologies

• Cloud
• Incident Management
• IoT
• Support
• Network
• Security
• DevOps

More

We are delivering an OT Uplift and Standardisation programme that is increasing in scale and complexity, creating the need for a single accountable architecture lead to establish the future-state direction and translate strategic objectives into practical, deliverable designs. This is a hands-on delivery role supported by a Programme Delivery Lead who coordinates planning, governance, milestones and dependencies, while we retain accountability for the quality, completeness and delivery of the architecture outputs. Our work spans OT, IT and cyber-physical environments, with a strong focus on operational availability, safety, resilience, security and alignment to our strategic and operational requirements.

last updated 31 week of 2026