OT Security

Career Tree Hr Solutions; Chennai District; On-site; INR 4,000,000 - 7,000,000; Full time

Job summary

Career Tree Hr Solutions seeks an experienced Senior Engineer/Leader OT Security to secure and maintain OT infrastructure across Chennai manufacturing operations. You will work with Automation, IT and Plant Maintenance teams to strengthen SCADA/HMI/MES environments and OT networks.

The role requires hands-on OT/ICS experience, strong knowledge of industrial protocols and security frameworks, and coordination with vendors for upgrades and incident response. Chennai-based, full-time opportunity.

Qualifications

• 10+ years of experience in industrial automation, OT/ICS, plant systems or OT cybersecurity.
• Hands-on OT/ICS experience is mandatory.
• Industrial/plant maintenance or OT systems support experience is required.
• Strong understanding of manufacturing/industrial environments.
• Experience with SCADA/HMI/MES/industrial networks/OT servers.
• Knowledge of firewalls, network segmentation, VLANs, secure remote access and endpoint security.

Responsibilities

• Manage and support OT/ICS infrastructure across manufacturing environments.
• Ensure availability, reliability and security of production-critical OT systems.
• Collaborate with Plant Maintenance, Automation and Engineering for OT troubleshooting.
• Support OT assets including SCADA, HMI, industrial servers, PLC-connected systems, MES and networks.
• Implement and maintain OT network security, segmentation, firewalls and secure remote access.
• Manage OT patching, backup/recovery, endpoint security and system hardening.
• Conduct OT asset identification, vulnerability assessment and risk mitigation.
• Support OT incident detection, investigation and response.
• Coordinate with OEMs/vendors for OT system maintenance and upgrades.
• Ensure OT security practices align with IEC 62443 / NIST.

Skills

OT/ICS experience

Hands-on OT/ICS

Industrial maintenance

SCADA/HMI/MES

OT security basics

Firewalls & segmentation

Industrial protocols

IT/OT integration

Vendor coordination

Tools

Claroty

Nozomi

Dragos

Job description

Senior Engineer / Leader OT Security

Location: Chennai
Experience: 10+ Years
Industry: Manufacturing / Industrial Automation

Job Summary

We are looking for an experienced OT Security professional with strong exposure to industrial/plant OT environments and OT systems maintenance/support. The role will be responsible for securing, maintaining and supporting OT infrastructure across manufacturing operations while working closely with Automation, Engineering, IT and Plant Maintenance teams.

Key Responsibilities

• Manage and support OT/ICS infrastructure across manufacturing/plant environments.
• Ensure availability, reliability and security of production-critical OT systems.
• Work closely with Plant Maintenance, Automation and Engineering teams for OT troubleshooting and support.
• Support OT assets including SCADA, HMI, industrial servers, PLC-connected systems, MES and industrial networks.
• Implement and maintain OT network security, segmentation, firewalls and secure remote access.
• Manage OT patching, backup/recovery, endpoint security and system hardening.
• Conduct OT asset identification, vulnerability assessment and risk mitigation.
• Support OT incident detection, investigation and response.
• Coordinate with OEMs/vendors for OT system maintenance, upgrades and troubleshooting.
• Ensure OT security practices align with relevant frameworks such as IEC 62443 / NIST.
• Support IT-OT integration while maintaining the security and availability of plant systems.
• Participate in commissioning, upgrades and technology implementation projects where required.
• Maintain OT documentation, asset inventories, network diagrams and maintenance records.

Required Skills

• 10+ years of experience in industrial automation, OT/ICS, plant systems or OT cybersecurity.
• Mandatory: Hands-on OT/ICS experience.
• Mandatory/Important: Industrial/plant maintenance or OT systems support experience.
• Strong understanding of manufacturing/industrial environments.
• Experience with SCADA / HMI / MES / industrial networks / OT servers.
• Knowledge of firewalls, network segmentation, VLANs, secure remote access and endpoint security.
• Experience in OT patching, backup/recovery and troubleshooting.
• Understanding of industrial protocols such as Modbus, OPC, Profinet, Ethernet/IP is advantageous.
• Knowledge of IEC 62443, NIST or other OT security frameworks is preferred.
• Ability to coordinate with Plant Maintenance, Automation, IT, Engineering and external vendors.

Good to Have

• PLC / DCS exposure
• OT asset discovery and monitoring tools such as Claroty / Nozomi / Dragos
• SIEM / SOC integration
• OT vulnerability management
• IT-OT convergence / Industry 4.0
• Experience in automotive, engineering, process or other manufacturing plants

Important: PLC programming is not mandatory. The key requirement is OT exposure + plant/industrial maintenance/support experience + OT security understanding.