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Senior OT Security Consultant
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About the Role:
We are working with a growing technology, consulting, and engineering organisation that supports energy, utilities, and critical national infrastructure clients across the UK.
They are looking to appoint a Senior OT Security Consultant to lead and deliver complex security engagements across the Energy & Utilities sector.
This is a senior client-facing role where you will help shape OT security strategy, lead technical delivery, advise senior stakeholders, and support the development of consultants across IT and OT security domains.
The successful candidate will bring deep OT/ICS security expertise, strong consulting capability, and a solid understanding of the regulatory landscape affecting energy, utilities, and critical infrastructure organisations.
Key Responsibilities:
- Lead OT and ICS security strategy development, maturity assessments, and architecture reviews.
- Advise senior client stakeholders on governance, risk, resilience, and regulatory obligations.
- Define OT security improvement roadmaps and support investment cases.
- Lead the design and validation of secure OT architectures, including network segmentation, firewalls, DMZs, and remote access.
- Oversee OT vulnerability assessments, configuration reviews, and secure integration of ICS solutions.
- Provide senior guidance during OT cyber incidents, including containment, forensics, and recovery.
- Interpret and apply relevant OT security and regulatory frameworks, including NIS/NISR, NCSC CAF, IEC 62443, and sector-specific expectations.
- Support audit readiness, evidence gathering, and remediation planning.
- Own senior client relationships and act as a key point of escalation.
- Produce and review high-quality deliverables including assessments, designs, reports, and recommendations.
- Support proposals, pre-sales activity, and business development opportunities.
- Mentor and coach junior consultants across OT and IT security engagements.
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Skills & Experience Required:
- Extensive experience across OT, ICS, SCADA, DCS, and industrial networking environments.
- Proven experience delivering and leading OT security engagements within Energy, Utilities, or critical national infrastructure.
- Strong understanding of ICS protocols such as Modbus, DNP3, IEC-104, OPC UA, or similar.
- Significant experience designing or reviewing OT architectures using the Purdue Model.
- Familiarity with major OT/ICS vendors such as Siemens, ABB, GE, or Schneider Electric.
- Experience applying frameworks such as IEC 62443, NIST CSF, NIST 800-82, and NCSC CAF.
- Strong stakeholder management experience, including the ability to advise senior technical and business leaders.
- Ability to translate complex OT cyber risks into practical, business-aligned recommendations.
- Excellent communication, documentation, workshop facilitation, and presentation skills.
- Comfortable working across complex industrial client environments.
Highly Desirable Experience:
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- OT/ICS security or safety certifications.
- ISA/IEC 62443 Cybersecurity Expert.
- GIAC certifications such as GRID, GICSP, or GCIP.
- TÜV Certified Cyber Security or Functional Safety certification.
- CISSP, CISM, ISO 27001 Lead Implementer or Lead Auditor.
- CCNA, CCNP, or equivalent networking certification.
- Experience with OT IDS technologies such as Claroty, Nozomi, or Dragos.
- Knowledge of secure ICS engineering lifecycle and OT asset management.
- Experience leading OT penetration testing or red-team style engagements.
- Understanding of IoT, IIoT, and cloud-connected OT systems.
- Ability to lead multidisciplinary teams and manage complex client programmes.
What’s on Offer:
- Senior consulting role focused on high-impact Energy, Utilities, and critical infrastructure projects.
- Opportunity to work on complex OT/ICS security challenges that directly support resilience, safety, and operational continuity.
- Exposure to senior stakeholders across major industrial and infrastructure organisations.
- Opportunity to mentor consultants and help shape the growth of an OT security capability.
- Hybrid working model.
- Competitive benefits package including pension, life assurance, employee support, private healthcare eligibility, annual leave, and learning resources.
Apply:
If you are an experienced OT Security Consultant with strong Energy, Utilities, or critical infrastructure experience, we would be keen to speak with you.
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