Subject Matter Expert -Networking (IBMS)

Siemens España; Thane; On-site; INR 2,500,000 - 4,500,000; Full time

Job summary

Siemens AG is seeking a Subject Matter Expert - Networking (IBMS) based in Mumbai, India. The role involves designing, reviewing, and commissioning enterprise-grade network infrastructure for IBMS, data centers, airports, and smart building projects. Extensive expertise in OT/IT convergence and cybersecurity is required.

You will lead technical delivery, mentor teams, and support tendering and solution architecture. Travel to project sites may be required as part of the duties.

Qualifications

• 8-15 years of experience in networking for IBMS/critical infrastructure projects.
• Knowledge of OT/IT convergence and industrial networking.
• Familiarity with IEC 62443 cybersecurity standards and related practices.

Responsibilities

• Design, review, and support enterprise-grade network for IBMS/Data Centers/Smart Buildings.
• Develop network topology, IP addressing, VLANs, redundancy, and cybersecurity design.
• Integrate BACnet/IP, Modbus TCP/IP, SNMP, OPC UA, MQTT and other OT protocols.

Skills

TCP/IP

Subnetting

Routing

Switching

OSPF

Cybersecurity

Education

BE/B.Tech in Electronics, Electrical, Instrumentation, Computer Science

Tools

Cisco Packet Tracer

Hirschmann Switches

Job description

Subject Matter Expert -Networking (IBMS)

527017

30-Oct-2026

Smart Infrastructure

\"We're improving the way we live and work by intelligently connecting energy systems, buildings, and industries!!

Smart infrastructure from Siemens makes the world a more connected and caring place – where resources are valued, where impact on the world is considered, where sustainable energy is delivered optimally and efficiently. It provides the flexible infrastructure to allow society to evolve and respond to changing conditions. Technology and the ingenuity of people come together to be at one with our environments and to care for our world. We do this from the macro to the micro level, from physical products, components, and systems to connected, cloud-based digital offerings and services. Siemens offers a broad portfolio of grid control and automation; low- and medium-voltage power distribution, switching and control; and building automation, fire safety and security, HVAC control and energy solutions.

Position: Networking SME - IBMS Solutions

Experience: 8-15 Years

Location: Mumbai, India (Travel to project sites as required)

Role Purpose:

The Networking SME will be responsible for designing, reviewing, supporting, commissioning, and troubleshooting enterprise-grade network infrastructure for Integrated Building Management Systems (IBMS), Data Centers, Airports, Metro Rail, Smart Buildings, and Critical Infrastructure projects. The role requires expertise in OT/IT convergence, industrial networking, cybersecurity, and multi-system integration.

Key Responsibilities

• Pan India Technical Support for Design & Engineering, Commissioning & Trouble shooting

• Develop network architecture for IBMS, BMS, FAS, CCTV, ACS, PA, SCADA, EMS, CPMS, and Data Center solutions.
• Prepare network topology, IP addressing plans, VLAN architecture, redundancy philosophy, and cybersecurity design.
• Design Layer-2 and Layer-3 networks for critical infrastructure applications.
• Perform bandwidth calculations and network sizing.

System Integration

• Integrate BACnet/IP, Modbus TCP/IP, SNMP, OPC UA, MQTT, and other OT protocols.
• Support third-party system integration through Ethernet networks.
• Define communication architecture between field controllers, servers, workstations, and cloud platforms.
• Support commissioning of network switches, routers, firewalls, and managed industrial networks.
• Resolve communication issues related to online/offline controllers, servers, gateways, and field devices.
• Conduct FAT, SAT, performance testing, and redundancy validation.
• Analyze network traffic using Wireshark and diagnostic tools.

Cybersecurity

• Implement IEC 62443/NIST-based cybersecurity practices.
• Configure VLAN segregation, ACLs, firewall rules, VPN access, and secure remote connectivity.
• Conduct network security assessments and vulnerability reviews.

Technical Leadership

• Act as L4 SME for project teams.
• Review engineering deliverables and mentor engineering/commissioning teams.
• Support tendering, solution architecture, customer presentations, and technical clarifications.

Required Technical Skills

Networking

• TCP/IP, Subnetting, Routing, Switching
• OSPF, Static Routing

Infrastructure

• Hirschmann Industrial Switches

Cybersecurity

Tools

• Cisco Packet Tracer

Desired Project Experience

Educational Qualification

• BE/B.Tech in Electronics, Electrical, Instrumentation, Computer Science, IT, or equivalent.

Tender & Compliance Review

Preferred Certifications

• Palo Alto Certifications
• IEC 62443 Cybersecurity Training

KPI

• Reduction in Commissioning TAT
• Zero Critical Cybersecurity Non-Conformities
• L4 Technical Support Effectiveness

\"WE DON'T NEED SUPERHEROES, JUST SUPER MINDS!

WE’VE GOT QUITE A LOT TO OFFER. HOW ABOUT YOU?

We’re Siemens. A collection of over 379,000 minds building the future, one day at a time in over 200 countries. We're dedicated to equality and we welcome applications that reflect the diversity of the communities we work in across Gender, LGBTQ+, Abilities & Ethnicity. All employment decisions at Siemens are based on qualifications, merit and business need. Bring your curiosity and imagination, and help us shape tomorrow.

Find out more about Smart Infrastructure at: https://new.siemens.com/global/en/company/topic-areas/smart-infrastructure.html and about Siemens careers at: www.siemens.com/careers