Job Description

Job Title: OT Network Engineer

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Function: Network Services / Operational Technology

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Location: Pune

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Role Purpose

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The OT Network Engineer is responsible for operating and supporting OT network

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environments across factories and industrial sites. The role ensures stable, secure,

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and resilient OT connectivity supporting plant operations, including industrial

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switching, OT firewalls, monitoring, incident response, remote access, lifecycle

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management, and network changes with minimal production impact.

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The engineer works closely with plant OT teams, central IT, security teams, onsite

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support, and vendors to deliver OT network services safely and reliably.

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Key Responsibilities

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- Operate and support OT LAN and connectivity services across manufacturing
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sites.

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- Ensure network health, availability, and performance aligned with plant
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constraints and SLAs.

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- Support centralized remote operations for OT environments.
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- Manage industrial switching environments and plant connectivity.
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- Configure, troubleshoot, and optimize switches, VLANs, segmentation, and
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redundancy.

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- Support industrial protocols such as PROFINET, Modbus, and EtherNet/IP.
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- Support OT firewalls (e.g., mGuard or equivalent).
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- Implement firewall rules, segmentation, NAT, and secure communication paths.
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- Align OT network changes with cybersecurity and plant security requirements.
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- Coordinate with security teams on hardening, patching, vulnerabilities, and
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secure remote access.

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- Monitor OT networks using approved tools.
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- Troubleshoot and resolve incidents, especially production-impacting issues.
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- Participate in major incidents and maintain accurate ITSM updates.
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- Execute planned OT network changes within approved processes and
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maintenance windows.

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- Support upgrades, new site rollouts, and design changes.
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- Maintain configurations, backups, baselines, and rollback plans.
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- Support secure OT remote access for internal teams and approved vendors.
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- Ensure access follows defined approvals, monitoring, and security controls.
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- Manage OT IP addressing, subnet planning, and documentation.
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- Support firmware upgrades, patching, and lifecycle management of OT devices.
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- Track EOL/EOS risks and coordinate upgrades during plant shutdown windows.
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- Coordinate with onsite teams, OEMs, and vendors for break-fix, RMA, and
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escalations.

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- Maintain OT network documentation, diagrams, inventories, and runbooks.
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- Contribute to RCA and continuous improvement of OT network operations.
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Required Skills & Experience

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Technical Skills

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- Robust experience in OT / industrial network operations
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- Hands-on experience with industrial Ethernet switching
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- Experience with OT firewalls (mGuard preferred)
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- Knowledge of network segmentation, IT/OT separation, and OT security zones
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- Solid understanding of TCP/IP, VLANs, routing, redundancy, NAT, ACLs, and
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firewalls

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- Experience with monitoring tools, incident/change management, and lifecycle
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activities

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- Knowledge of Purdue model and OT cybersecurity is desirable
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Experience

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- 5+ years in network operations, with 23 years in OT / industrial environments
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- Experience supporting manufacturing plants or industrial sites
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- Experience in high-availability, safety-critical environments
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Soft Skills

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- Strong troubleshooting and analytical skills
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- Calm under production-impacting situations
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- Good communication and coordination skills
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- Strong documentation and change discipline
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- Willingness to work in 24x7 or on-call support models if required
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Preferred

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- Experience in global manufacturing environments
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- Exposure to OT cybersecurity, IT/OT convergence, or factory modernization
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📌 OT Network Engineer (Pune)
🏢 Tata Consultancy Services
📍 Pune