Job Summary

We are seeking an experienced Cyber Security Specialist to strengthen our organization's security operations, threat management, vulnerability management, and security engineering functions. The ideal candidate will possess strong hands-on expertise in security monitoring, incident response, threat hunting, security tool administration, and enterprise security operations. This role requires proactive identification of cyber threats, effective incident handling, and continuous improvement of security controls across enterprise environments.

Key Responsibilities

Security Monitoring & Incident Response

- Monitor, analyze, and investigate security s using SIEM, EDR, and XDR platforms.
- Lead end-to-end incident response activities including triage, containment, eradication, recovery, and remediation.
- Conduct root cause analysis and post-incident reviews.
- Develop and maintain incident response procedures and playbooks.
- Coordinate with internal stakeholders during security incidents and cyber crisis situations.

Threat Detection & Threat Hunting

- Perform proactive threat hunting using endpoint telemetry, network traffic, and security logs.
- Develop, optimize, and tune detection rules aligned with the MITRE ATT&CK; framework.
- Identify advanced threats, malicious activities, and indicators of compromise (IOCs).
- Convert threat hunting findings into actionable detection use cases and security improvements.

Vulnerability & Exposure Management

- Perform vulnerability assessments and manage enterprise vulnerability scanning activities.
- Assess vulnerabilities for business impact and risk severity.
- Partner with infrastructure, cloud, and application teams to ensure timely remediation.
- Validate vulnerability fixes and ensure SLA compliance.
- Track and report remediation progress to leadership.

Security Engineering & Hardening

- Design, implement, and maintain enterprise security baselines.
- Harden and secure Windows, Linux, Active Directory, Microsoft 365, and cloud environments.
- Support security testing, purple team exercises,



and validation assessments.
- Improve security configurations across endpoints, servers, network devices, and cloud workloads.

Security Tools & Platform Management

Manage and optimize:

- SIEM & SOAR Platforms (Microsoft Sentinel, Splunk)
- EDR/XDR Solutions (Microsoft Defender, CrowdStrike)
- Firewalls, IDS/IPS, and Web Application Firewalls (WAF)
- Cloud Security Platforms
- Vulnerability Management Tools

Governance, Risk & Compliance (GRC)

- Support security audits and compliance initiatives.
- Ensure adherence to frameworks such as ISO 27001, NIST CSF, PCI-DSS, and applicable regulatory standards.
- Provide evidence collection, audit support, and compliance reporting.
- Participate in risk assessments and remediation planning.

Documentation & Reporting

- Maintain incident response documentation, runbooks, and operational procedures.
- Develop security dashboards and metrics including MTTD and MTTR.
- Prepare executive-level reports on security events, trends, and organizational security posture.
- Present findings and recommendations to senior management.

Required Qualifications

Education

- Bachelor's degree in Computer Science, Information Security, Cyber Security, Information Technology, or related discipline.
- Master's degree is preferred.

Experience

- 7-10 years of hands-on experience in Cyber Security, Security Operations Center (SOC), Incident Response, or Threat Management roles.
- Proven experience managing enterprise-scale security operations and incident response activities.

Technical Skills

Mandatory Skills

- EMC Networker
- SIEM Platforms (Microsoft Sentinel, Splunk)
- EDR/XDR Solutions (Microsoft Defender, CrowdStrike)
- Firewalls, IDS/IPS, and Security Monitoring Tools
- Vulnerability Management Platforms
- Windows and Linux Security Administration
- Active Directory Security
- Cloud Security Concepts (Azure, AWS, or GCP)
- Network Security and Security Operations

Mandatory Skills : EMC Networker

Microsoft Security stack (M365 Advance security) , Microsoft Purview , Defender XDR. Working knowledge of TrendMicro, Vulnerability management

PAN INDIA

📌 Cyber Security Specialist (Chennai)
🏢 Siera IT Services Private
📍 Chennai