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 strong 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