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Posted Mar 24, 2026

Freelance Network & OT Cybersecurity Engineer

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Freelance Network & OT Cybersecurity Engineer We are currently seeking an experienced Freelance Network & OT Cybersecurity Engineer (10+ years of experience) to support a network architecture redesign and cybersecurity implementation for an industrial environment. Scope of Work 1. Network Architecture The current infrastructure consists of a flat network. The objective is to redesign the architecture into a structured and segmented industrial network. # The proposed design should include: - A hierarchical network architecture (Core / Distribution / Access layers) per site - Segmentation between sites while allowing controlled sharing of selected networks - Design and placement of industrial firewalls - Secure interconnection between multiple sites - A migration plan for the existing switches (reuse where possible and replace if required) 2. Cybersecurity Implementation - The environment already includes some OT cybersecurity components, and we plan to enhance the architecture with additional monitoring and analysis tools. # The scope includes: - Integration and configuration of Guardian, Collector, and CMC - Deployment and implementation of Nozomi Guardian Analyzer and Central Manager - Implementation of a secure architecture aligned with OT cybersecurity best practices 3- Expected Deliverables. #. Site Assessment - Assess the current infrastructure across all sites - Verify switch locations, connectivity, and existing network topology # Network & Cybersecurity Design - Proposed network architecture design - Network segmentation strategy - Detailed network diagrams # Migration Plan - Strategy for migrating from the current flat network to the new architecture # Bill of Quantity (BOQ) - Complete BOQ for network and cybersecurity components - Estimated budget for the proposed solution This is a freelance / consulting opportunity. Engineers with strong experience in industrial networking, OT cybersecurity, and multi-site network design are encouraged to apply. Apply Now Apply Now