OT Security Maintenance Specialist leads initiatives across OT systems by utilizing his/her extensive knowledge of OT systems and environments. He/she works with cybersecurity and operational personnel in Digital Engineering Department to create and implement mitigation strategies in order to effectively protect against cyber threats and vulnerabilities within the OT landscape. He/she possess in-depth expertise in security technologies such as firewall logs, IDS, endpoint security solutions, access control systems, and other related security technologies within the OT environment. He/she also works alongside the cybersecurity team to conduct research and develop or deploy new capabilities and solutions.
Work Functions
Discover and manage organization’s OT assets:
- Verify OT assets discovery process and asset inventory, commissioning and decommissioning
- Create a detailed diagram of OT assets and networks to ensure comprehensive visibility
- Collaborate with Digital Engineering teams to identify proper asset management solutions for deployment and implement security controls to mitigate associated risks
- Establish security validation processes on OT assets for compliance against established baselines
- Establish, review or update configuration baselines for inventoried assets to support OT Security program
- Ideally understanding cybersecurity standards: ISO27001 and IEC62443
Improve And Maintain Cybersecurity Posture Of OT Systems
- Define patching and control needs of the organization’s OT system and prioritize related activities
- Oversee implementation of controls or patches, ensuring minimal disruption within acceptable risk levels.
- Collaborate with operational and cybersecurity teams to plan and monitor regular maintenance of OT security infrastructure
- Perform OT security posture assessment
- Establish rules for authentication and identification across devices and users to achieve cybersecurity objectives within the OT environment
- Monitor the access and activities of third parties and vendors in the OT environment
Enhance IT-OT Alignment And Collaboration
- Promote knowledge sharing in both the IT and OT Security teams
- Develop standardized vocabulary for IT and OT Security teams based on the identified standards and framework
- Articulate potential pain points and solutions in aligning IT and OT departments
- Manage cross-team strategic projects according to guidance from the senior leadership
- Work with the cybersecurity team to conduct research to develop or deploy new capabilities and solutions.
Location
Kolding, Amsterdam, Hamburg, London, Stockholm and Katowice.
Company Description
Vattenfall is a European energy company with approximately 21 000 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 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.
Qualifications
In this role, you'll be instrumental in maintaining a secure and resilient operational technology (OT) environment. Your responsibilities will include identifying and managing critical assets, ensuring accurate inventory tracking, and overseeing the administration and maintenance of security related configurations and tools in the network infrastructure.
You’ll take the lead in driving OT compliance and assurance efforts, aligning our practices with key cybersecurity standards such as ISO27001 and IEC62443. Through proactive risk assessments and mitigation strategies, you’ll help us stay ahead of emerging threats. Your expertise in vulnerability and patch management will be essential in maintaining the integrity and reliability of our systems.
Equally important is your role in fostering a culture of security awareness. You’ll contribute to OT security education initiatives, empowering teams with the knowledge and tools they need to uphold best practices across the organization.
Beyond your technical capabilities, your soft skills will set you apart. You’re a strong communicator and creative problem solver, with a talent for making sense of complex challenges. You thrive in collaborative environments, value inclusivity, and bring a transdisciplinary mindset that bridges gaps between teams and technologies.
Additional Information
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, August 10th 2025. Due to summer holidays we take a longer application period and won’t start screening and inviting candidates till the week of August 11th. We kindly request that you do not send applications by any means other than via our website and that you refrain from submitting a cover letter with your application. You apply quickly and easily by answering screening questions and attaching your CV.
For more information about the recruitment process you are welcome to contact our recruiter
[email protected]At Vattenfall 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! 
