Engineering Cybersecurity Specialist - Rail Signalling

Defend the critical technology that keeps the world moving safely.

For over 160 years, Siemens Mobility has been a global leader, innovating transportation solutions that move the world. We lead the way in Rolling Stock, Rail Automation & Electrification, Turnkey Systems, Intelligent Traffic Systems, and comprehensive Related Services. Through digitalization, we empower operators worldwide to create intelligent infrastructure, enhance passenger experience, and ensure unparalleled availability. Join us in transforming Mobility Management, Turnkey Projects, Electrification, Mainline & Urban Transport, and Customer Services. If you're ready to make a real impact on a more connected and sustainable future, your journey starts here.

Your mission in our team As an Engineering Cybersecurity Specialist, you will protect the operational technology (OT) and industrial systems that drive global railway infrastructure. You will coordinate cybersecurity across the entire project lifecycle, ensuring our signalling solutions are secure by design while balancing safety, high availability, and operational continuity.

You’ll make a difference by

• Provide support to commercial and bid teams when required, while remaining primarily focused on project execution. This includes analysing opportunities and customer specifications, identifying key cybersecurity needs and risks, and contributing to preliminary proposals aligned with tender requirements and Siemens’ technological approach.

• Prepare, maintain, and implement the project-specific Cybersecurity Management Plan, applying and tailoring the principles, processes, and technical guidance of the IEC 62443 series, CENELEC TS 50701, and IEC 63452, as applicable.

• Perform or contribute to the Threat and Risk Analysis based on the project architecture, operational context, applicable requirements, and identified threats and vulnerabilities, and maintain it throughout the project lifecycle.

• Collect and analyse cybersecurity requirements originating from customer specifications, applicable standards and regulations in the countries where projects are delivered, and Siemens’ internal policies and requirements.

• Harmonise these inputs into a coherent, traceable, and technically feasible set of requirements, allocate them to systems, subsystems, components, suppliers, and partners, and incorporate them into the solution delivered to the customer.

• Work with customer and Siemens stakeholders to reconcile priorities, resolve gaps or conflicts, and align the final customer’s cybersecurity expectations with Siemens’ technological proposal.

• Contribute to system and solution architecture, defining and implementing appropriate security controls and defence-in-depth concepts, including zones and conduits, network segmentation, hardening, access control, physical security considerations, and secure configuration standards.

• Support the selection and secure integration of Siemens and third-party products, technologies, suppliers, customer-specific mechanisms, and shared infrastructure services.

• Address operational security capabilities such as intrusion detection, security monitoring, malware protection, vulnerability management, and security patch management, considering safety, availability, and lifecycle constraints.

• Act as the cybersecurity interface for project management, system and subsystem engineering, R&D, testing, installation, suppliers, partners, and customers, providing clear guidance and supporting security-related decisions.

• Plan, coordinate, and support cybersecurity verification and validation activities—including security requirement verification, vulnerability assessments, and penetration testing—evaluate findings against the Threat and Risk Analysis, and define or follow up corrective and risk-mitigation actions.

• Support installation, commissioning, operation, maintenance, and cybersecurity handover by providing guidance and awareness, and by clearly communicating relevant documentation, residual risks, operational measures, and responsibilities.

• Monitor and follow up security vulnerabilities and incidents affecting the system or project, coordinating their assessment, treatment, documentation, and communication with the appropriate stakeholders.

Your success is grounded in

• A Degree in Telecommunications, Computer Science, Industrial Engineering, Cybersecurity, or equivalent practical expertise.
• Solid experience (typically 3+ years) in cybersecurity engineering, OT security, or system engineering within critical infrastructure.
• A deep understanding of defence-in-depth, network segmentation, vulnerability management, and secure system integration.
• The ability to balance strict cybersecurity objectives with the safety, legacy, and lifecycle constraints of railway operations.
• A proactive, analytical mindset with the ability to take ownership of complex challenges and communicate solutions clearly.
• Fluency in English (C1) and the willingness to travel internationally when required.

You’ll thrive even more if you also bring

Specific experience in railway signalling systems and familiarity with the Cyber Resilience Act (CRA) or NIST frameworks.

Relevant cybersecurity certifications, particularly focused on Industrial or Operational Technology (OT) security.

Even if you don't meet every single requirement, we encourage you to apply! We value potential, eagerness to learn, and diverse backgrounds.

What you can expect when joining

You will be part of a team driving digital innovation, sustainability, and positive social impact through customer-oriented solutions.

An inclusive environment where you can be your authentic self and truly belong, supported by dedicated teams and DEI learning resources.

A hybrid work model that gives you the best of both worlds: the energy of in-person collaboration and the flexibility of remote work.

A culture that values curiosity and guarantees continuous learning, offering personal and professional development opportunities for everyone.

If we all thought the same, we would never think of anything new! That’s why we recruit great minds from all walks of life. We recognise that building a diverse workforce is essential to the success of our business, therefore we encourage applications from a diverse talent pool. We welcome the opportunity to discuss flexibility requirements with our applicants to encourage agile working and innovation. Flexibility is our main benefit. We combine remote and presence work because work-life balance and wellbeing are essential for our teams. We are convinced that stay at home allow us to focus on activities that need more time for concentration and being at the office enhance our creativity collaborating and learning from others.

Siemens aboga por la igualdad de oportunidades entre mujeres y hombres, así como en la Diversidad como fuente de creatividad e innovación. Contar con diferentes tipos de talento y de experiencias nos hace ser más competitivos y estar mejor preparados para responder con éxito a las demandas de la Sociedad. Por ello, valoramos a las candidatas y a los candidatos que reflejen la Diversidad que disfrutamos en nuestra Compañía y animamos la cobertura de puestos por mujeres y hombres en ocupaciones que se encuentren subrepresentadas.

Join us and let's shape the future of mobility together! Apply now.

Job ID

525895

Posted since

15-Oct-2026

Organization

Mobility

Field of work

Engineering

Company

SIEMENS MOBILITY, S.L.U.

Experience level

Mid-level Professional

Job type

Full-time

Work mode

Office/Site only

Employment type

Permanent

Location(s)

• Tres Cantos - Madrid - Spain