Cyber Security Specialist

Location: UK (Hybrid / Site-based as required)

Reports to: Head of Cyber Security / IT & OT Security Manager

We are seeking a skilled Cyber Security OT Specialist to protect and secure our Operational Technology (OT) environments across UK operations. This role will focus on safeguarding industrial control systems (ICS), SCADA, and OT networks from cyber threats while ensuring system availability, safety, and regulatory compliance.

The successful candidate will work closely with IT, engineering, and operations teams to design, implement, and maintain robust OT cyber security controls aligned with best practice and industry standards.

• Protect OT environments including ICS, SCADA, PLCs, and industrial networks.
• Identify, assess, and manage cyber risks across OT systems and assets.
• Develop and maintain OT cyber security policies, standards, and procedures.

• Design and implement secure OT network architectures, including segmentation and zoning.
• Deploy and manage OT-specific security tools (firewalls, IDS/IPS, asset discovery, monitoring).
• Ensure secure remote access for third parties and maintenance providers.
• Monitor OT environments for cyber threats and vulnerabilities.
• Lead or support incident response activities relating to OT systems.
• Conduct root cause analysis and implement corrective actions following incidents.

• Ensure compliance with relevant standards and frameworks (e.g. IEC 62443, NIST, ISO 27001).
• Support internal and external audits, risk assessments, and penetration testing.
• Maintain accurate documentation of OT assets, risks, and controls.
• Work closely with engineering, operations, and IT teams to embed security by design.
• Provide OT cyber security guidance, training, and awareness to site teams.
• Act as a subject matter expert for OT cyber security across the business.

• Proven experience in OT cyber security
  , industrial networks, or ICS security.
• Strong understanding of OT environments, including PLCs, SCADA, DCS, and HMI systems.
• Knowledge of OT network protocols (e.g. Modbus, OPC, Profibus, Ethernet/IP).
• Experience implementing OT security controls in live operational environments.
• Understanding of cyber security risk management and incident response.
• Experience in manufacturing, utilities, energy, or other critical infrastructure sectors.
• Familiarity with IEC 62443, NIST CSF, or similar OT security frameworks.
• Certifications such as GICSP, CISSP, CISM, or equivalent.
• Experience working in UK regulated environments.

• Methodical and risk-aware, with a strong focus on safety and availability.
• Able to communicate complex technical issues clearly to non-technical stakeholders.
• Collaborative, pragmatic, and solutions-focused.
• Comfortable balancing security requirements with operational needs.