Senior Information Security Analyst, Cyber Threat Detection

7 days ago

Singapore TD Full time

Job Description Role and Responsibilities We are seeking an experienced and technically proficient Senior Information Security Analyst (L9) to join the Cyber Threat Detection (CTD) team. This role will focus on developing and tuning detection alerts for the Cyber Security Operations Center (CSOC), with a strong emphasis on engineering use cases, alert fidelity, and automated response integration. Detection Engineering & Alert Development Design, implement, and tune detection logic for Microsoft Defender for Identity (MDI), Defender for Endpoint (MDE), and Defender for Office (MDO) alerts. Build and maintain detection use cases aligned with threat models and business risk profiles Collaborate with CSOC to ensure alert coverage, reduce false positives, and improve triage efficiency Security Use Case Lifecycle Own the end-to-end lifecycle of security use cases: from ideation and threat modeling to deployment and continuous tuning Develop and maintain triage playbooks and enrichment logic for alerts. Integrate detection logic with XSOAR playbooks for automated response Operational Support & Collaboration Partner with Threat Hunting, CSIRT, CSOC, and infrastructure teams to validate alert efficacy and ensure operational readiness. Participate in incident response efforts by providing detection context and supporting investigations Contribute to weekly CSOC reporting and metrics reviews to assess alert performance and coverage Project-Specific Contributions Support the E5 uplift by reviewing Microsoft security alerts and aligning them with enterprise threat models. Assist in the synchronization of MDI/XDR incidents with XSOAR and ensure CSOC access and playbook readiness Qualifications 7+ years of experience in information security, with at least 5 years in detection engineering or SOC operations Deep understanding of SIEM/SOAR platforms (e.g., Splunk, XSOAR), Microsoft Defender suite, and threat detection methodologies Strong scripting and automation skills (Python, PowerShell, etc.)Familiarity with MITRE ATT&CK framework and threat modeling practices Excellent communication and collaboration skills across technical and non-technical stakeholders Preferred Certifications CISSP, GIAC (GCIA, GCIH, GCED), Microsoft SC-200, or equivalent Who We Are TD is one of the world's leading global financial institutions and is the fifth largest

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