Industrial systems are becoming more digital – and more vulnerable. At the same time, many OT systems were never designed for regular updates. As a result, security gaps often go unnoticed or remain unpatched, increasing the risk of system failures, production downtime or compliance violations.
This is where the partnership between NTT DATA and ondeso comes in. Since 2022, we have been combining our expertise to strengthen digital security and operational continuity in industrial infrastructures with practical, real-world solutions.
Patch management in OT is a unique challenge. Many systems are decades old, run 24/7, and can’t be updated easily. At the same time, the pressure on industrial companies is growing due to new regulations, increasing threats and higher requirements for reliability. A well-structured patch management process is no longer optional. It’s a vital requirement for secure and stable industrial operations.
With “OT Patch Management as a Service,” NTT DATA offers a fully managed solution tailored specifically to industrial OT environments – powered by our software, ondeso SR.
This managed service brings multiple benefits: Your OT systems are protected against cyber threats, while your internal team can focus on core operations. Clear reporting gives you full visibility of patch status and potential risks.
Patches can be rolled out outside of production hours to minimise downtime. And importantly, the solution is customised to your production environment – for maximum impact with minimal disruption.
Step-by-Step Process
1. Proactive Security Assessment
With ondeso SR, your systems are continuously scanned for missing security updates.
2. Verification
NTT DATA identifies necessary patches for critical assets – based on vendor guidance and OT best practices.
3. Deployment Preparation
Updates are prioritised and prepared, considering specific system requirements, known constraints and scheduled maintenance windows.
4. Implementation
Once prepared, your OT operations team can decide when and how patches are deployed. NTT DATA’s experts are available to support the process if needed.
Client Management Software for OT
There are many industrial PCs in OT environments. Discover here how you can manage these clients securely and reliably with ondeso SR.
ondeso SR was built specifically for industrial environments – and even supports legacy systems from Windows XP SP3 onwards. It runs without WSUS or Active Directory – a key requirement for many heterogeneous OT landscapes. The software operates entirely on-premises, meeting the high security standards of many organisations.
For selecting relevant updates, ondeso SR supports manufacturer patch lists based on IEC 62443-2-3. You’ll find a list of supported vendors here.
Additional measures like backups, write protection filters, or system hardening can be integrated into the process. Customisable workflows and flexible execution options ensure you remain in control – without disrupting ongoing operations.
„Effective OT patch management is not a ‘nice to have’ – it’s a necessity. But it must not disrupt operations. Our partnership with ondeso helps us strike this balance.”“
Alexander Rudolf
Director Cybersecurity Business Development at NTT DATA
Alexander Rudolf, Director of Cybersecurity Business Development at NTT DATA, is responsible for the partnership with ondeso. For him, the value is clear: This cooperation enables a solution deeply rooted in the realities of industrial systems – with true process understanding and practical technology. “Effective OT patch management is not a ‘nice to have’ – it’s a necessity. But it must not disrupt operations. Our partnership with ondeso helps us strike this balance.”
Peter Lukesch, CEO of ondeso, also highlights the importance of shared understanding. It’s not about the perfect theory – it’s about solutions that work in everyday operations. “Many companies need help to build secure OT processes. The combination of NTT DATA’s consulting expertise and our ondeso SR software provides that foundation – structured, documented, and practical.”
Both perspectives underline one key insight: OT patch management should not be treated as a separate task, but as an integrated process.
NTT DATA is a global leader in business and technology services, with annual revenues of over USD 30 billion. Serving 75% of the Fortune Global 100, the company supports innovation, optimisation, and transformation for long-term success.
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Christoph Ackermann
Head of Professional Services
Phone: +49 941 462932-32
More about ondeso SR
Click here for more information about our OT administration software designed for industrial PCs.
References & Success Stories
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