OT Network Architect

Architecture

-, Warszawa+4 Locations

Sii

25 200 - 33 600PLN

Net per month - B2B

Full-time

B2B

Senior

Remote

Tech stack

Polish

C1

LAN

advanced

VLAN

advanced

PLC

advanced

TCP/IP

advanced

WAN

advanced

Scada

advanced

Microsoft 365

nice to have

Job description

Requirements description

• 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

Offer description

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

Job details

• Recruitment language: Polish

• Start ASAP

• Permanent contract

• Fully remote

Perks in the office

• Free coffee

• Free breakfast

• No dress code

• Modern office

• In-house trainings

Benefits

• Sport subscription

• Training budget

• Private healthcare

• Small teams

• International projects

About Sii Poland

• Founded in:2006

• Company size:7500+

• Locations:Warszawa + 13

Since 2006 on the market, 7 500+ experts, PLN 2,1 billion revenue, 11 times Great Place to Work title – get to know Sii, the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We implement projects for over 200 clients from all over the world. Our mission is to identify and promote the best Workers – Power People. Learn more at sii.pl.

Published: 09.08.2025

Meet the company

Sii

Od 2006 roku na rynku, 7 500+ ekspertów, 2,1 miliarda złotych przychodu, 10-krotny tytuł Great Place to Work – poznajcie Sii, czołowego dostawcę doradztwa​ technologicznego, transformacji cyfrowej oraz usług biznesowych i inżynieryjnych w Polsce.

Company profile

Office location