Cyber Security Consultant

Principal Delivery Consultant - working with some of the best tech consultants in the UK

• Senior Cyber Security Consultant / Senior OT Consultant
• Location: Sheffield
• Working Pattern: Hybrid – up to 3 days a week onsite
• Clearance: DV Clearance Essential
• Employment Type: Permanent or Contract
• IR35 status: Inside

A leading defence and national security organisation is seeking a Senior Operational Technology (OT) Consultant / Senior Cyber Security Consultant to support a major new facility build within the defence nuclear sector.

You’ll join a small cyber/OT team with Principals and Junior Consultants. The role exists to take workload from Principal Consultants while also mentoring juniors and delivering hands‑on technical work.

• Lead OT cyber security deliverables on a major nuclear/defence programme.
• Conduct OT security risk assessments on equipment, systems and industrial environments.
• Coordinate with project teams and vendors to gather technical information and validate system details.
• Deliver security compliance activities and technical implementation aligned to standards such as IEC 62443.
• Produce security documentation, risk records and technical guidance.
• Mentor junior consultants and support quality assurance across their work.
• Contribute to secure design, architecture and control implementation in OT/ICS environments.
• You must have Active DV clearance – we cannot put you through this if you do not already have it
• Strong Operational Technology (OT) cyber security background
• Practical experience delivering components of IEC 62443 (certificate not necessary)
• Experience with risk assessments, threat analysis and security control implementation
• Ability to engage with vendors and engineering teams to source and verify technical information
• Experience working in highly regulated or critical national infrastructure environments
• Comfortable mentoring junior team members
• Defence, nuclear or wider CNI sector experience
• Knowledge of NCSC, NIST CSF, or ISO 27001
• Understanding of ICS/SCADA, PLCs, and industrial protocols

Please apply with a copy of your CV and Emma from SR2 will reach out to potential candidates regarding next steps.

• Mid‑Senior level

• Contract

• Information Technology

• IT Services and IT Consulting