Senior OT Security Consultant

Our client, a specialist OT Cyber Security consultancy supporting some of the UK's most critical national infrastructure organisations, is seeking a Senior OT Security Consultant to join their team. This permanent role provides the opportunity to work fully remotely and requires UK-wide travel for client engagements.

The role is fully remote buyt expect to travel to client sites.

Key Responsibilities: OT Cyber Security Consulting

• Lead OT cyber security consulting engagements across critical national infrastructure sectors.


• Deliver OT security assessments across ICs, SCADA, DCS, and wider industrial control environments.


• Conduct IEC 62443 gap assessments and support customers in achieving compliance and maturity objectives.


• Perform cyber security maturity assessments using recognised frameworks such as NCSC CAF, IEC 62443, NIST SP 800-82, and ISO 27001.


• Advise clients on NIS and NIS2 compliance requirements and support readiness programmes.


• Produce remediation roadmaps, improvement plans, and strategic recommendations.


• Deliver cyber risk assessments focused on operational technology environments.


• Facilitate stakeholder workshops to identify risks, priorities, and security improvement opportunities.

Technical Leadership & Assurance

• Provide consultancy oversight across OT cyber transformation programmes.


• Review and assure engineering designs, architectures, and technical solutions.


• Collaborate with engineering teams to ensure consulting recommendations can be effectively delivered.


• Support clients in the development of OT cyber security governance, policies, standards, and procedures.


• Ensure solutions align with operational requirements, safety considerations, and regulatory expectations.


• Mentor and support junior consultants and engineers across the business.


• Contribute to the ongoing development of consulting methodologies, frameworks, and service offerings.

Business Development & Client Engagement

• Support the preparation of bids, proposals, and statements of work.


• Participate in customer meetings, workshops, and pre-sales activities.


• Provide technical subject matter expertise during business development engagements.


• Build strong relationships with customer stakeholders across engineering, operations, cyber security, and executive leadership functions.


• Identify opportunities to expand consulting engagements and support long-term customer success.

Job Requirements: Required Experience

• Experience delivering OT Cyber Security consultancy engagements within industrial or critical infrastructure environments.


• Strong understanding of OT/ICS environments, including technologies such as SCADA, PLCs, DCS, and industrial networks.


• Experience conducting security assessments, gap assessments, or cyber maturity reviews.


• Knowledge of industry frameworks such as IEC 62443, NCSC CAF, NIS/NIS2, or equivalent OT security standards.


• Ability to identify cyber security risks and develop practical remediation recommendations.


• Experience engaging with technical, operational, and senior business stakeholders.


• Strong report writing, presentation, and workshop facilitation skills.

Technical Knowledge

Good understanding of:

• Operational Technology (OT) and Industrial Control Systems (ICS)


• SCADA and industrial automation environments


• OT cyber security risks and threat landscape


• Network segmentation and security architecture principles


• IEC 62443 and OT security best practices


• Critical National Infrastructure security requirements


• The differences between IT and OT security environments

Qualifications & Certifications

Essential

• Demonstrable OT Cyber Security experience

Desirable

• IEC 62443 qualifications


• CISSP


• GICSP


• CISM


• NCSC Chartered status

Security Clearance

Essential

• Must hold UK Security Clearance (SC) or be eligible and willing to undergo SC clearance.


• To be eligible for SC clearance, candidates must typically have resided in the UK for the required vetting period and meet UK Government security vetting requirements.

What Success Looks Like:

• Delivering high-quality OT cyber security assessments and consultancy engagements.


• Building trusted relationships with customers across CNI sectors.


• Producing clear, actionable recommendations that improve customer security posture.


• Supporting the growth of the consultancy practice through technical leadership and customer engagement.


• Mentoring engineers and helping develop future consulting capability within the company.

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