SIEM/MDR Infra support (SOC Cybersecurity)

Atos; Cyberjaya; On-site; MYR 180,000 - 240,000; Full time

Job summary

Atos is seeking an experienced SIEM infra support specialist in Cyberjaya to lead day-to-day SIEM operations ensuring platform health, log-source availability, and high-quality detection. You will coordinate with SOC, infrastructure, cloud, network, and applications teams to resolve SIEM-related issues.

The role emphasizes tuning detection rules, reducing false positives, onboarding new log sources, and maintaining runbooks and documentation to support incident response and disaster recovery

Qualifications

• 5–7+ years of experience in SIEM, SOC, or cybersecurity operations.
• Strong hands-on experience with Microsoft Sentinel or another enterprise SIEM platform.
• Good knowledge of KQL and log analysis.
• Strong understanding of log ingestion, data connectors, analytics and detection rules.
• Experience handling technical escalations and coordinating with multiple teams.
• Knowledge of incident, change, and problem management.
• Strong troubleshooting, leadership, and communication skills.

Responsibilities

• Lead and manage the SIEM team, allocating daily operational activities and monitoring delivery.
• Act as the primary technical escalation point for complex SIEM issues.
• Monitor SIEM platform health, log ingestion, connectors, parsing, and data quality.
• Ensure critical log sources are onboarded, available, and continuously monitored.
• Review and manage detection and correlation rules, including tuning and false-positive reduction.
• Coordinate with SOC, infrastructure, cloud, network, and application teams to resolve SIEM-related issues.
• Track team activities, pending tasks, technical issues, and operational milestones.
• Ensure incidents and service requests are resolved within agreed SLA and OLA timelines.
• Review SIEM changes and ensure testing and implementation.
• Support onboarding of new log sources, integrations, and security use cases.
• Review technical incidents, identify root causes, and implement corrective actions.
• Maintain SIEM SOPs, runbooks, and technical documentation.
• Support SOC during major incidents and provide technical expertise.
• Participate in disaster recovery and business continuity testing for SIEM monitoring continuity.
• Provide regular operational updates and reports to management.

Skills

SIEM operations

Team leadership

Kusto Query Language (KQL)

Log ingestion & data quality

Incident/change/problem management

Technical escalation

Collaboration across teams

Tools

Microsoft Sentinel

Splunk

QRadar

ArcSight

Trellix

Job description

The SIEM infra support specialist is responsible for managing the day-to-day SIEM operations team, ensuring platform health, log-source availability, detection quality, timely resolution of technical issues, and effective support to Security Operations Center (SOC) operations.

Key Responsibilities

• Lead and manage the SIEM team, allocating daily operational activities and monitoring delivery.
• Act as the primary technical escalation point for complex SIEM issues.
• Monitor SIEM platform health, log ingestion, connectors, parsing, and data quality.
• Ensure critical log sources are onboarded, available, and continuously monitored.
• Review and manage detection and correlation rules, including tuning and false-positive reduction.
• Coordinate with SOC, infrastructure, cloud, network, and application teams to resolve SIEM-related issues.
• Track team activities, pending tasks, technical issues, and operational milestones.
• Ensure incidents and service requests are resolved within agreed SLA and OLA timelines.
• Review SIEM changes and ensure appropriate testing and implementation.
• Support the onboarding of new log sources, integrations, and security use cases.
• Review technical incidents, identify root causes, and implement corrective actions.
• Maintain SIEM standard operating procedures, runbooks, and technical documentation.
• Support SOC teams during major incidents and provide technical expertise.
• Participate in disaster recovery and business continuity testing to ensure SIEM monitoring continuity.
• Provide regular operational updates and reports to management.

Required Qualifications and Skills

• 5–7+ years of experience in SIEM, SOC, or cybersecurity operations.
• Strong hands-on experience with Microsoft Sentinel or another enterprise SIEM platform.
• Good knowledge of Kusto Query Language (KQL) and log analysis.
• Strong understanding of log ingestion and data connectors, analytics and detection rules, alert tuning, false-positive reduction, data parsing and normalization, SIEM troubleshooting and health monitoring, and use-case development and testing.
• Experience handling technical escalations and coordinating with multiple teams.
• Good understanding of incident, change, and problem management.
• Strong troubleshooting, leadership, and communication skills.

Preferred Qualifications

• Experience with Microsoft Sentinel, Microsoft Defender XDR, Microsoft Entra ID, and Azure security.
• Knowledge of SOAR, Automation Rules, Logic Apps, and Playbooks.
• Experience with Splunk, QRadar, ArcSight, or Trellix.
• Knowledge of MITRE ATT&CK, threat hunting, and threat intelligence.
• Experience with SIEM migration or onboarding projects.
• Knowledge of SIEM cost optimization and ingestion monitoring.

Preferred Certifications

• Microsoft Certified: Security Operations Analyst Associate (SC-200)
• GIAC Certified Incident Handler (GCIH) or GIAC Certified Intrusion Analyst (GCIA)
• ITIL 4

Key Performance Indicators

• SIEM platform and log-source availability.
• Timely resolution of technical escalations.
• SLA and OLA compliance.
• Successful onboarding of log sources and integrations.
• Improved detection quality and reduced false positives.
• Timely delivery of SIEM use cases and operational tasks.
• Reduction in recurring SIEM issues.
• Effective team performance and operational reporting.