Sr. SOC Engineer (L3)

Larsen & Toubro; Chennai; On-site; INR 800,000 - 1,400,000; Full time

Job summary

Larsen & Toubro is seeking an experienced SOC L3 to act as a senior technical escalation point. You will lead threat hunting, advanced investigations, and security engineering improvements across multi-tenant GPU cloud infrastructure, ensuring zero trust and regulatory alignment.

The role involves defending cloud environments, coordinating with Threat Intelligence and Red Team functions, and mentoring SOC analysts while driving incident response and compliance efforts.

Qualifications

• 8–15 years cybersecurity experience in regulated environments.
• Deep expertise with SIEM platforms (e.g., Splunk, QRadar, Chronicle).
• Proficient in MITRE ATT&CK, threat hunting, and cloud security (Azure/AWS/GCP).
• Strong in incident response, forensics, and automation using Python/PowerShell.
• Knowledge of Zero Trust Architecture and identity security (AD/Entra ID/PAM).

Responsibilities

• Lead investigation of sophisticated cyber attacks and APTs.
• Proactive threat hunting across enterprise environments.
• Develop advanced detection engineering use cases.
• Design and optimize SIEM, SOAR, XDR, and cloud security monitoring.
• Conduct endpoint, network, and cloud forensics.
• Develop incident response playbooks and automation workflows.
• Mentor SOC analysts and coordinate with Threat Intelligence teams.
• Support security audits, compliance, and executive reporting.

Skills

Threat hunting

Incident investigations

Security engineering

Zero Trust

Cloud security

Forensics

Automation

Kubernetes security

GPU infrastructure security

Identity security

Education

BE/B.Tech in CS or ECE

Tools

Splunk

QRadar

Chronicle

Defender XDR

SentinelOne

CrowdStrike

PAM solutions

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.

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.

Implementation

• oEnforce IAM/RBAC, least privilege, and network micro segmentation; secrets/KMS integration.
• oDefine secure baselines for OS, containers, CUDA drivers, and platform services; supply chain controls (image signing/SBOM).
• oImplement 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

Operations

• oContinuous vulnerability management, patch cadence, threat detection (EDR/XDR), and audit log integrity.
• oPeriodic access reviews, key rotation, and compliance evidence packs.

Reliability & Incident

• oIncident response (containment/forensics/eradication); purple team exercises; tabletop drills.

Data Protection

• oEncryption 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 regulated environments.
• 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.