Bengaluru, Karnataka

Job Summary

Operational Technology Network

Security Architect L4 OT Security Architect

Role Summary

We are seeking a skilled and experienced OT Security Architect with robust hands-on expertise in Operational Technology security, OT network architecture, secure remote access, Zero Trust access models, and industrial cybersecurity frameworks.

This position requires a solid understanding of industrial network zones and conduits, Purdue Model architecture, OT/IT segmentation, vendor remote access, identity integration, firewall/security policy design, and compliance with IEC 62443, NIST, and internal cybersecurity policies.

Key Responsibilities

Operational Technology / Cyolo Architecture

Key Responsibilities

OT Architecture & Network Security Design
Design and review secure OT network architectures aligned with the Purdue Model and industrial security best practices.
Define and implement OT security zones and conduits, including segmentation between IT, OT, DMZ, production, engineering, and vendor access zones.




Develop reference architectures for secure remote access, OT firewall placement, jump server access, identity-based access, and secure vendor connectivity.
Review existing OT environments and recommend architecture improvements to reduce risk and improve security posture.
Support the design of OT DMZ, industrial firewall rules, secure routing paths, access control flows, and network isolation models.
Work with network, firewall, platform, and plant teams to ensure OT architecture designs are practical, resilient, and operationally supportable.
Validate architecture designs against security principles such as least privilege, defense-in-depth, Zero Trust, secure-by-design, and asset criticality.

Secure Remote Access & Zero Trust Implementation
Lead the design, deployment, and management of Cyolo Secure Remote Access solution across OT environments.
Implement Zero Trust access controls for vendors, third-party use

📌 Domain Architect Bengaluru
🏢 HCLTech
📍 Bengaluru