Job Title: OT Network Engineer

Key Responsibilities

- Operate and support OT LAN and connectivity services across manufacturing

sites.

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

constraints and SLAs.

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

redundancy.

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

secure remote access.

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

maintenance windows.

- Support upgrades, new site rollouts, and design changes.
- Maintain configurations, backups, baselines, and rollback plans.
- Support secure OT remote access for internal teams and approved vendors.
- Ensure access follows defined approvals, monitoring, and security controls.
- Manage OT IP addressing, subnet planning, and documentation.
- Support firmware upgrades, patching,



and lifecycle management of OT devices.
- Track EOL/EOS risks and coordinate upgrades during plant shutdown windows.
- Coordinate with onsite teams, OEMs, and vendors for break-fix, RMA, and

escalations.

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

Required Skills & Experience

Technical Skills

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

firewalls

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

activities

- Knowledge of Purdue model and OT cybersecurity is desirable

Experience

- Experience supporting manufacturing plants or industrial sites
- Experience in high-availability, safety-critical environments

Soft Skills

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

Preferred

- Experience in global manufacturing environments
- Exposure to OT cybersecurity, IT/OT convergence, or factory modernization

initiative

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