About the project

• 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.

Your responsibilities

• 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

Our requirements

• 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

Technologies we use

What we offer

• 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