OT Security Engineer

X4 Technology; Reading; Hybrid; GBP 70,000 - 95,000; Full time

Job summary

X4 Technology is seeking an experienced OT Security Specialist to secure clients' industrial control systems and OT networks. Remote role with occasional site visits to Reading, and collaboration with cross-functional teams to implement security controls and policies.

You will conduct OT risk assessments, manage vulnerabilities, and respond to incidents, applying IEC 62443 guidance. Interviews in Oct 2026; Start date November 2026.

Qualifications

• 5+ years in IT/OT security, with ≥3 years in OT security.
• Hands-on experience securing ICS/SCADA and OT networks.
• Experience in OT risk assessments, vulnerability management, patching and incident response.
• Knowledge of OT security standards, IEC 62443.
• Excellent communication and collaboration with technical and operational teams.

Responsibilities

• Secure clients' OT infrastructure, including ICS/SCADA environments.
• Conduct OT risk assessments and identify vulnerabilities; recommend mitigations.
• Implement and manage OT security controls; monitor network traffic; respond to incidents.
• Develop OT security policies and procedures; ensure regulatory compliance.
• Collaborate with cross-functional teams; run OT security training and awareness programs.

Skills

IT/OT security

ICS/SCADA security

OT risk assessment

Vulnerability management

Incident response (OT)

IEC 62443 knowledge

Security monitoring

Communication skills

Job description

Location: Remote with occasional site visits in Reading

OT Security Specialist - Role & Responsibilities

• Secure the client's operational technology infrastructure, including Industrial Control Systems (ICS) and SCADA environments.
• Conduct OT risk assessments, identify vulnerabilities and potential threats, and recommend effective mitigation strategies.
• Implement and manage OT security controls, monitor network traffic, and respond to and manage security incidents.
• Develop OT security policies and procedures, ensuring compliance with industry standards and regulatory requirements.
• Work closely with cross-functional teams to deliver security controls, and run OT security training and awareness programmes.

OT Security Specialist - Required Experience

• 5+ years' experience in IT/OT Security, with at least 3 years focused on OT security, ideally within manufacturing environments.
• Strong hands-on experience securing Industrial Control Systems (ICS) and SCADA environments, including OT network infrastructure and control system components.
• Proven experience with OT risk assessments, vulnerability management and patching, and security incident response within OT environments.
• Good understanding of OT security standards and regulations, particularly IEC 62443, along with the tools used to monitor and protect OT systems.
• Strong communication skills, with the ability to explain security risks clearly and collaborate effectively with technical and operational teams.

Interviews: October 2026

Start Date: November 2026