Senior OT Consultant

Job Description

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

Salary (perm): £75,000 - £85,000 ~

Day rate (contract): £600–£750

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 / IC4 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 IC4 / 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.