OT Security Arctitect

Join Vattenfall to lead and shape the OT (Operational Technology) security architecture capability that underpins our operational technology platforms across sites and fleets.

This is not only an architecture role. You will act as a Technical Authority for OT security, owning standards, guiding engineering teams, and ensuring consistent and secure solutions across projects and operational assets.

You will play a key role in building and developing OT security competencies across Digital Engineering, while ensuring our architectures are robust, compliant, and scalable.

What you’ll do

Architecture & Governance

• Define, publish, and maintain the OT security architecture baseline based on IEC 62443 and relevant standards
• Own the design, selection, and lifecycle of OT security controls and architectures across projects and operational assets
• Establish and enforce security standards, reference architectures, and design guardrails
• Act as the technical escalation point for complex OT security decisions and risk trade-offs

Technical Authority & Capability Building

• Act as Technical Authority for OT security, ensuring quality and consistency of engineering solutions
• Guide, coach, and challenge engineering and project teams on secure design and implementation
• Drive competence development in OT security across engineering teams (methods, tooling, best practices)
• Translate security requirements into clear, actionable guidance for engineers, operations, and stakeholders

Security Engineering & Operationalisation

• Own and steer key OT security workflows (segmentation, access management, hardening/patching, logging/detection, incident response, backup)
• Ensure these workflows are standardised, embedded in roadmaps, and consistently implemented across sites and projects
• Define and maintain OT Security Provisions for primary OT zones, including technical patterns and operational requirements
• Support projects and assets in implementing, operating, and continuously improving these provisions

Architecture Integration & Stakeholder Alignment

• Contribute to and shape OT/IT reference architecture, including zone models and secure integration patterns
• Anchor security control decisions across business units, working with security and compliance functions
• Lead design reviews, risk assessments, and formal approvals of OT security architectures

Experience & Expertise

• Extensive experience in OT cybersecurity and security architecture, ideally in energy, renewables, or industrial environments
• Strong expertise in IEC 62443, with experience applying related standards (ISO 27001, ISO 27019, NIS2) in real-world architectures
• Deep knowledge of segmentation, DMZ architectures, secure remote access, and cross-domain data flows

Technical Authority & Leadership

• Proven track record acting as a senior technical lead or authority across multiple systems or projects
• Ability to make and defend architectural decisions, including balancing risk, availability, and operational constraints
• Strong experience driving standardisation, governance, and cross-team alignment

Communication & Influence

• Ability to explain complex security concepts clearly to engineers, operations, and leadership
• Experience influencing teams without direct line authority
• Strong mentoring and coaching skills, with a focus on building organisational capability

Engineering & Delivery Understanding

• Experience structuring and documenting architecture principles and solution designs
• Proven ability to embed security into engineering workflows, playbooks, and operational models
• Understanding of OT environments where availability and safety are critical

Our offer 
Good remuneration, a challenging and international work environment, and the possibility to work with some of the best in the field. You will be working in interdisciplinary teams and you can always count on support from committed colleagues. We offer attractive employment conditions and opportunities for personal and professional development. 

More Information 
We welcome your application in English, no later than 14/06/2026. We kindly request that you do not send applications by any means other than via our website as we cannot guarantee that we will be able to process applications that are not made via our website. 
 
For more information about the recruitment process you are welcome to contact our recruiter Adam Hammond via adam.hammond@vattenfall.com 

Commitment to Diversity

Vattenfall is committed to promoting a diverse and inclusive community - a place where we can all be ourselves and succeed on merit. We offer a range of family friendly, inclusive employment policies, flexible working arrangements, staff engagement forums and services to support all our employees.

We are convinced that diversity contributes to build a more profitable and attractive company and we strive to be good role model regarding diversity. Vattenfall works actively for all employees to have the same opportunities and rights regardless of gender, ethnicity, age, transgender identity or expression, religion or other belief, disability or sexual orientation. 
 
We look forward to receiving your application! 

Vattenfall is a European energy company with approximately 21000 employees. For more than 100 years we have electrified industries, supplied energy to people’s homes and modernized our way of living through innovation and cooperation. We now want to make fossil-free living possible within one generation. To be able to reach this ambitious goal we are looking for talented individuals who, in addition to their passion for their own role, also have strong team spirit and want to contribute to supporting a meaningful corporate mission.