Modernizing IT/OT Architecture for Secure Digital Integration

Bridging the IT/OT Divide for Digital Success

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A critical infrastructure operator needed to enable data flow from operational technology (OT) systems to enterprise and cloud platforms to support digital initiatives. However, flat OT networks, legacy architectures, elevated cybersecurity risk, and organizational silos between IT, OT, and security teams made modernization complex. Any disruption to control systems was unacceptable.

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Infrastructure Modernization Challenge

The organization’s legacy OT environment relied on flat network architectures that increased cyber risk and limited safe data integration. At the same time, fragmented ownership across IT, OT, and security teams hindered coordinated decision-making. The modernization effort needed to improve security and enable digital integration while maintaining strict operational uptime and safety requirements.

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Integrated Solution Design

Our team of engineers assessed the existing IT/OT environment and designed secure, converged architectures aligned with the Purdue Model and IEC 62443 zones-and-conduits principles. Modernization activities were phased and sequenced to minimize risk, preserve operational continuity, and create a scalable foundation for future digital initiatives.

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Architecture Transformation Results

• Current-State Assessment: Comprehensive evaluation of IT and OT environments, network architectures, and integration points
• Secure Reference Architecture: Future-state designs incorporating layered security controls and segmentation
• Standardized Architecture Templates: Multi-site standards to ensure consistent and repeatable deployment
• Secure Data Flow Design: Defined plant-to-enterprise and cloud connectivity patterns with built-in security controls
• Integration Standards: Architecture and integration guidelines to support ongoing operations and future expansion

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This modernization effort established a secure, scalable foundation for digital transformation—enabling enterprise and cloud integration while maintaining operational reliability andregulatory compliance.

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