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OT Network Architect
Sii Sp. z o.o.Łódź, Łódź, Poland30+ days ago
Job descriptionMicrosoft 365 Windows Server We are currently looking for an experienced OT Network Architect to join a strategic, large-scale project for a global leader in the energy sector. This role offers a unique opportunity to take part in the design of OT network architecture and the segmentation of IT and OT networks across approximately 70 manufacturing sites worldwide. You will play a key role in shaping the security and connectivity landscape of industrial environments on a global scale. Design and develop logical and physical network architecture documentation to support IT / OT network segmentation across global industrial sites Create and maintain High-Level and Low-Level Design (HLD / LLD) architecture documents Lead the design and deployment of OT network solutions in complex, multi-site environments Apply knowledge of networking fundamentals and segmentation principles to design secure and resilient infrastructures Identify and implement appropriate technologies to support evolving business and operational needs Ensure alignment of OT network designs with broader IT infrastructure and cybersecurity strategies Proactively identify risks and define mitigation strategies, including recommending suitable security controls for critical systems Collaborate with cross-functional teams to integrate OT systems such as SCADA, DCS, and PLCs into secure network architectures Maintain a holistic approach to network design, balancing availability, security, and industrial operation requirements Work independently and take ownership of assigned tasks, ensuring high-quality, timely delivery of solutions Background in creating Logical and Physical Design documents to support IT / OT Network Segmentation Proven track record in developing and updating High-Level and Low-Level Design (HLD / LLD) Architecture Documents Extensive OT Network expertise with solid knowledge of networking fundamentals and segmentation Hands-on practice in architecting and deploying global solutions within complex environments Familiarity with existing, new, and emerging technologies, with the ability to apply them to business designs and models Solid understanding of broader Infrastructure and Security domains Self-motivated, capable of working independently, taking initiative, and delivering results without constant oversight Focused on a holistic approach, considering unique industrial constraints to balance security, availability, and operational requirements Skilled in developing risk mitigation strategies and recommending appropriate security controls to safeguard critical assets Practical exposure to operational technology systems in industrial environments (SCADA, DCS, PLCs, and other control systems) Deep understanding of networking concepts, protocols, and architectures, including TCP / IP, subletting, routing, switching, VLANs, firewalls, and segmentation principles Fluent Polish and residing in Poland required Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 60M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People
technologies-expected :
- VLAN
- SCADA
- TCP / IP
- Firewalls
technologies-optional :
about-project :
responsibilities :
requirements-expected :
offered :
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Ot Network Architect • Łódź, Łódź, Poland
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