OT Cyber Security Consultant

Moore Kingston Smith LLP; Greater London; On-site; GBP 65,000 - 70,000; Full time

Job summary

A leading UK consultancy firm is seeking an OT Cyber Security Consultant in London to lead security assessments and develop methodologies for safety-critical environments. The role involves collaborating with engineering and IT teams to improve cyber resilience across operational assets. Candidates should have approximately 5 years of experience in OT/ICS cyber security and be familiar with security risk management and control system architectures. This role offers competitive compensation and clear opportunities for career development.

Qualifications

• Approximately 5 years’ experience in OT/ICS cyber security or C&I system engineering.
• Familiarity with control system architectures (PLC, DCS, SCADA).
• Experience in cyber risk assessments and system security evaluations.

Responsibilities

• Conduct OT and ICS security risk assessments.
• Develop cyber security requirements for OT systems.
• Evaluate system architectures and security controls.

Skills

OT/ICS cyber security experience

Control system architectures knowledge

Cyber risk assessments experience

Knowledge of IEC 62443 and ISO standards

Strong writing and communication skills

UK Security Clearance eligibility

Education

Relevant qualifications (GICSP, CISSP, etc.)

Job description

OT Cyber Security Consultant

Department: Cyber

Employment Type: Permanent - Full Time

Location: City, London

Compensation: £65,000 - £70,000 / year

Description

Moore Kingston Smith is seeking an experienced OT Cyber Security Consultant to join the Moore ClearComm team, leading system security risk assessments, control system evaluations, and developing bespoke assurance methodologies for complex, safety-critical environments.

Working alongside our OT security specialist, you’ll bridge the gap between control and instrumentation engineering and cyber security disciplines, shaping practical, standards-aligned security improvements that protect critical infrastructure.

This is a unique opportunity to join an expanding cyber security consulting service, with clear pathways for career progression as we build a best-in‑class service for our clients. We help organisations strengthen their cyber resilience, from penetration testing and threat assessments to governance frameworks and incident response readiness, ensuring security enables growth, innovation, and compliance.

Key Responsibilities

• Conduct OT and industrial control system (ICS) security risk assessments across operational assets and supporting systems.
• Develop and refine cyber security requirements to support OT systems design and security arrangements used to protect OT systems at supply chain and nuclear operations stages.
• Carry out security assurance activities to confirm adequacy of security arrangements used by Supply Chain to develop OT systems or by Asset owners that operate OT systems.
• Evaluate system architectures, network segmentation, and security controls for SCADA, DCS, and Control & Instrumentation systems.
• Support clients in aligning with regulatory and industry requirements, particularly within the civil nuclear and critical infrastructure sectors.
• Contribute to security cases, safety justifications, and security assurance documentation.
• Collaborate with multi-disciplinary teams including engineering, safety, IT, and compliance specialists.
• Support internal capability development, including the creation of OT security frameworks and training materials.

Skills, Knowledge and Expertise

Essential:

• Approximately 5 years’ experience in OT/ICS cyber security or C&I system engineering, including security risk management.
• Familiarity with control system architectures (PLC, DCS, SCADA) and industrial network protocols.
• Experience performing or supporting cyber risk assessments, system security evaluations, or vulnerability analysis.
• Working knowledge of applicable standards (IEC 62443, NCSC CAF, ISO 27001/27019, NIST 800-82).
• Strong writing and communication skills able to translate technical findings into clear, actionable recommendations and specifications.
• Eligible for UK Security Clearance (SC) or already holding clearance.

Desirable:

• Experience in the civil nuclear and/or energy generation sectors.
• Knowledge of safety systems and safety case integration.
• Awareness of threat intelligence, incident response, or OT monitoring tools.
• Relevant qualifications (e.g. GICSP, IEC 62443, CISSP, CISM, CompTIA Security+, or equivalent).

Benefits