Job Title: OT Network Engineer /n Function: Network Services / Operational Technology /n Location: Pune /n Role Purpose /n The OT Network Engineer is responsible for operating and supporting OT network /n environments across factories and industrial sites. The role ensures stable, secure, /n and resilient OT connectivity supporting plant operations, including industrial /n switching, OT firewalls, monitoring, incident response, remote access, lifecycle /n management, and network changes with minimal production impact. /n The engineer works closely with plant OT teams, central IT, security teams, onsite /n support, and vendors to deliver OT network services safely and reliably. /n Key Responsibilities /n /n

- Operate and support OT LAN and connectivity services across manufacturing

/n /n sites. /n /n

- Ensure network health, availability, and performance aligned with plant

/n /n constraints and SLAs. /n /n

- 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

/n /n redundancy. /n /n

- 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

/n /n secure remote access. /n /n

- Monitor OT networks using approved tools.

/n

- 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

/n /n maintenance windows. /n /n

- Support upgrades, recent 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

/n /n escalations. /n /n

- Maintain OT network documentation, diagrams, inventories, and runbooks.

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- Contribute to RCA and continuous improvement of OT network operations.

/n /n Required Skills & Experience /n Technical Skills /n /n

- Strong 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

/n /n firewalls /n /n

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

/n /n activities /n /n

- Knowledge of Purdue model and OT cybersecurity is desirable

/n /n Experience /n /n

- 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

/n /n Soft Skills /n /n

- 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

/n /n Preferred /n /n

- Experience in global manufacturing environments

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- Exposure to OT cybersecurity, IT/OT convergence, or factory modernization

/n

📌 OT Network Engineer (Pune)
🏢 Tata Consultancy Services
📍 Pune