Sr. SOC Engineer (L3)

Larsen & Toubro Limited; Chennai District; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

Larsen & Toubro Limited is seeking a Cybersecurity SOC L3 Lead in Chennai to head advanced investigations, threat hunting, and security engineering improvements. You will drive zero-trust governance, multi-tenant GPU cloud security, and regulatory alignment, while mentoring junior analysts and coordinating with threat intelligence teams.

The role requires 8–15 years in cybersecurity with strong SIEM/XDR expertise and extensive experience in incident response, forensics, and automation.

Qualifications

• 8–15 years in cybersecurity with cloud security and data privacy in regulated environments.
• Deep expertise in SIEM platforms such as Splunk, QRadar, Chronicle or equivalents.
• Security automation using Python/PowerShell/Logic Apps and SOAR platforms.

Responsibilities

• Lead investigation of sophisticated cyber attacks and APTs.
• Perform proactive threat hunting across enterprise environments.
• Develop detection engineering use cases and incident response playbooks.
• Design and optimize SIEM, SOAR, XDR and cloud security monitoring.
• Coordinate with Threat Intelligence and Red Team functions.
• Mentor SOC L1/L2 analysts and support leadership reporting.

Skills

Threat hunting

Incident response leadership

Security governance

Leadership & mentoring

Education

BE/BTech in CS/EC

Tools

Splunk/ELK SIEM

EDR/XDR

Image scanners (Trivy/Clair)

Vault/KMS/HSM

NVIDIA DCGM

Firewalls/WAF

Job description

Cybersecurity SIEM - Security Information Event Management SOAR Forensic Analysis Incident Reporting

Bachelor of Technology (BTech)

Job Description

Job Purpose

The SOC L3 acts as the Senior technical escalation point within the SOC, leading threat hunting, advanced incident investigations, security engineering improvements, and strategic cyber defence initiatives. Protect multi tenant GPU cloud with defense in depth, ensuring zero trust, auditability, and regulatory alignment.

Role Description

Key Responsibilities

• Lead investigation of sophisticated cyber attacks and advanced persistent threats (APTs).
• Perform proactive threat hunting across enterprise environments.
• Develop advanced detection engineering use cases.
• Design and optimize SIEM, SOAR, XDR, and cloud security monitoring capabilities.
• Conduct forensic investigations across endpoints, networks, cloud, and identity platforms.
• Develop incident response playbooks and automation workflows.
• Lead post-incident reviews and lessons-learned sessions.
• Provide security recommendations to architecture and engineering teams.
• Mentor SOC L1/L2 analysts and support career development.
• Coordinate with Threat Intelligence and Red Team functions.
• Support security audits, compliance, and executive reporting.
• ON-CALL Support for L2/L1 support team.
• Enforce IAM/RBAC, least privilege, and network micro segmentation; secrets/KMS integration.
• Define secure baselines for OS, containers, CUDA drivers, and platform services; supply chain controls (image signing/SBOM).
• Implement and management experience of cloud network security controls such as security groups, firewalls, WAF, DDoS, micro-segmentation, EDR, DLP, PIM/PAM and secure connectivity etc
• Continuous vulnerability management, patch cadence, threat detection (EDR/XDR), and audit log integrity.
• Periodic access reviews, key rotation, and compliance evidence packs.
• Reliability & Incident
• Incident response (containment/forensics/eradication); purple team exercises; tabletop drills.
• Encryption in transit/at rest, tenant isolation boundaries, data retention, legal holds, and purge workflows.

Experience & Educational Requirements

Qualifications and Experience

EDUCATIONAL QUALIFICATIONS: (degree, training, or certification required)

BE/B-Tech or equivalent with Computer Science or Electronics & Communication

RELEVANT EXPERIENCE: (no. of years of technical, functional, and/or leadership experience or specific exposure required)

• 8–15 years cybersecurity; strong cloud security, zero trust, and data privacy in regulatedenvironments.
• Deep expertise in Sentinel, Splunk, QRadar, Chronicle, or equivalent SIEM platforms.
• Advanced knowledge of Microsoft Defender XDR, Defender for Cloud, CrowdStrike, SentinelOne, and other XDR solutions.
• Strong threat hunting expertise using MITRE ATT&CK framework.
• Expertise in cloud security (Azure, AWS, GCP).
• Digital forensics and malware reverse engineering knowledge.
• Security automation using Python, PowerShell, Logic Apps, SOAR platforms.
• Detection engineering and threat modeling skills.
• Knowledge of Zero Trust Architecture and Identity Security.
• Ability to lead major security incidents and crisis management efforts.
• Experience with Active Directory, Microsoft Entra ID, CyberArk, or enterprise PAM solutions.
• Experience with NIST CSF, NIST 800-61, MITRE, CIS Controls, and ATTACK evaluations.
• Experience building SOC metrics, executive dashboards, and reporting for senior leadership.
• Experience with security architecture reviews and cloud landing zone security.
• Investigate advanced identity-based attacks involving Active Directory, Microsoft Entra ID, PAM, IAM, Kerberos, and hybrid identity environments.
• Lead investigations involving Kubernetes, container runtime, virtualization platforms, and GPU infrastructure security.

Tools / Tech

SIEM (Splunk/ELK), EDR/XDR, image scanners (Trivy/Clair), OPA/Gatekeeper, Vault/KMS/HSM, HashiCorp Boundary (or equivalent), NVIDIA DCGM, NVIDIA BCM, Firewalls, DDOS, WAF, LB, VAM, PAM

Certifications

CISSP; CISM/CISA; CCSP; ISO 27001 Lead Implementer/Auditor, GCFA, GCTI, CISSP, CCSP, AZ-500, SC-100, SC-200, GIAC Certifications, Microsoft Cybersecurity Architect Expert, Kubernetes Security Specialist.

KPIs

Mean time to detect/respond, vulnerability backlog burn down, audit non conformities, policy violation rate.