Tambaram Chennai Tamil Nadu Information security analyst Jobs – 126 Open Jobs Today

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SeniorAdministrator - Security Information And Event Management (SIEM)

HCLTech -
Chennai, Tamil Nadu

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Job details

Qualifications

Knowledge management
Incident management
SIEM

Full job description

Chennai, Tamil Nadu
Job Summary

The OT SOC Level 2 Analyst is responsible for advanced security monitoring, investigation, and incident response within Operational Technology (OT) environments using Nozomi Networks and Microsoft Sentinel . The role acts as an escalation point for Level 1 analysts and contributes to continuous improvement of OT SOC operations through detection fine-tuning, SOP and playbook development, and team enablement—while ensuring security actions align with OT safety, availability, and operational constraints.

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Key Responsibilities

Responsibilities

Perform Level 2 triage and investigation of OT security alerts generated by Nozomi Networks.
Validate and analyse alerts using OT context such as asset criticality, industrial processes, site topology, and maintenance activities.
Determine incident scope, root cause, impacted assets, and potential operational or safety impact.
Lead and coordinate OT incident response activities in collaboration with SOC, OT engineers, and IT security teams.
Escalate confirmed or high-risk incidents according to SOC and OT incident response procedures.
Investigate OT-related incidents in Microsoft Sentinel by correlating Nozomi alerts with IT, network, and security telemetry.
Support development and refinement of OT-specific detection use cases and alert logic.
Perform detection fine-tuning to improve signal quality and reduce false positives based on operational feedback.
Contribute investigation logic and response steps for SOC playbooks and runbooks .
Create, maintain, and improve OT SOC SOPs , incident response procedures, and investigation guides.
Support post-incident reviews and incorporate lessons learned into procedures and detection improvements.
Act as an escalation and mentoring point for Level 1 OT SOC analysts .
Provide training and knowledge transfer on OT threats, Nozomi alert interpretation, and investigation techniques.
Support continuous improvement of OT SOC processes, reporting, and operational maturity.
Skill Requirements

1. Advanced Proficiency In Security Incident Response And Technical Solution Implementation Using Siem Tools.
2. Strong Knowledge Of Incident Management Processes And Security Best Practices.
3. Excellent Analytical And Problem-Solving Skills For Complex Incident Resolution.
4. Proficient In Knowledge Management And Training Methodologies.

Other Requirements

Technical Skills Hands-on experience using Nozomi Networks for OT alert triage, investigation, and anomaly analysis. Experience investigating incidents using Microsoft Sentinel as a SIEM. Strong understanding of OT/ICS architectures, including Purdue Model, zones and conduits

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information security analyst jobs in tambaram chennai tamil nadu

SeniorAdministrator - Security Information And Event Management (SIEM)

Lead Test Engineer

Java Angular Developer

Sr. Salesforce Developer, Quote-to-Cash

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