OT Cyber Security Consultant

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

Job summary

A leading cybersecurity consulting firm in London seeks an experienced OT Cyber Security Consultant to lead security risk assessments and improve the security framework for critical infrastructure. The role involves collaborating with engineering and compliance specialists to develop and refine cybersecurity requirements, ensuring alignment with regulatory standards. This position offers clear career progression opportunities and is ideal for candidates with approximately five years of relevant experience and eligibility for UK Security Clearance.

Qualifications

• Approximately 5 years experience in OT/ICS cyber security or C&I system engineering.
• Familiarity with IEC 62443, NCSC CAF, ISO 27001 standards.
• Eligible for UK Security Clearance (SC).

Responsibilities

• Conduct OT and ICS security risk assessments.
• Develop and refine cyber security requirements for OT systems.
• Evaluate system architectures and security controls.
• Support clients with regulatory and industry requirements.

Skills

OT/ICS cyber security

Security risk management

Control system architectures

Industrial network protocols

Communication skills

Technical documentation

Education

Relevant qualifications (e.g. GICSP, CISSP)

Job description

OT Cyber Security Consultant

Department: Cyber

Employment Type: Permanent - Full Time

Location: City, London

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

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.

\3>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