Senior OT Cyber Security Engineer - Rail & ICS

Siemens Mobility; Ashby-de-la-Zouch; On-site; GBP 85,000 - 120,000; Full time

Job summary

Siemens Mobility seeks an experienced Senior Cyber Security Engineer (Assurance) to lead cyber security across UK rail OT projects. You will guide security strategies, develop requirements, and oversee verification activities from bid support to commissioning, ensuring robust assurance for signalling, control systems, SCADA and station tech.

The role requires IEC 62443 familiarity, proven experience in OT environments, and strong stakeholder engagement to deliver secure rail infrastructure

Qualifications

• Degree-qualified in Engineering, Computer Science, Cyber Security or related discipline.
• Extensive experience delivering security assurance on OT/ICS projects.
• Proven ability to lead security risk assessments and threat modelling.

Responsibilities

• Act as the cyber security lead across complex rail OT projects.
• Develop and manage Cyber Security Management Plans and assurance evidence.
• Lead security risk assessments, threat modelling, and mitigation planning.
• Define security architectures using zoning, segmentation and conduits.
• Provide technical leadership and mentoring to project teams.

Skills

OT security

Threat modelling

Security architecture

Risk assessments

Stakeholder engagement

Mentoring

Education

Degree in Engineering/CS/Cyber Security or related

Job description

Siemens Mobility seeks an experienced Senior Cyber Security Engineer (Assurance) to lead cyber security across UK rail OT projects. You will guide security strategies, develop requirements, and oversee verification activities from bid support to commissioning, ensuring robust assurance for signalling, control systems, SCADA and station tech.

The role requires IEC 62443 familiarity, proven experience in OT environments, and strong stakeholder engagement to deliver secure rail infrastructure