Cyber Security Operational Technology (OT) Specialist

Cyber Security Operational Technology (OT) Specialist

Location: Immingham

Contract Type: Permanent

Salary: £57K - £60K

Benefits: Pension, Private Medical, Incentive plan, 25 Holidays

The Role

Are you passionate about OT Cyber Security and ready to make a tangible impact across multiple UK energy generation and storage sites?

We're looking for a Cyber Security OT Specialist with strong first-line technical skills and a solid grounding in risk management frameworks, ideally with experience in the energy sector. This is a key role within the cyber risk function, supporting critical infrastructure and helping shape secure and resilient OT environments aligned with IEC62443 standards.

Key Responsibilities

• Lead the implementation of new technical security controls across OT environments.
• Contribute to the assessment of OT network architecture, protocols, and change management processes.
• Lead incident response and remediation for cyber events detected by OT SIEM systems.
• Actively support vulnerability management and ensure threat exposure is minimised.
• Provide hands-on leadership in data and asset management, including backup and removable media deployments.
• Apply and track security metrics to ensure the ongoing effectiveness of controls.
• Deliver awareness training and cyber security guidance across OT engineering teams.
• Champion collaboration across cyber, IT, and engineering teams-bridging gaps between tech, process, and people.

What We're Looking For

• The ability to work independently and manage multiple priorities.
• A strong desire to continuously learn, share knowledge, and adapt in a dynamic environment.
• A high regard for environmental, safety, and regulatory standards.
• A keen understanding of the Purdue Model, OT/DMZ/IT network segregation, and energy-sector-specific technologies.
• Demonstrable experience implementing security controls within OT environments.
• Hands-on knowledge of OT technologies and protocols, including experience managing configuration changes.
• Experience working within incident response frameworks-from coordination to containment and recovery.
• Familiarity with threat modelling and architectural reviews, particularly in critical national infrastructure.
• Relevant certifications or credentials in IEC62443 or cyber security frameworks applicable to OT environments.
• Understanding of the NCSC Cyber Assessment Framework (CAF) is highly desirable.

Why Join?

Known for the ability to think and act fast using energy intelligence, the mission is to enable the energy transition by providing the power needed today and tomorrow.

Whether you're an experienced professional or looking to grow, structured development pathways are provided.

Offers competitive salary, pension scheme, PMI (private medical insurance), long-term incentive plan and holiday starting at 25 days plus bank holidays.

Ready to Apply?

If you are looking for a new challenge within a dynamic and forward-thinking organisation, we want to hear from you!

Apply today and help shape the future of power generation.

Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.