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Senior Security Researcher

Microsoft· Security Research
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Redmond, WA$119.8k - $234.7kFull-timePosted 1w ago

About the role

Security-focused role within Microsoft Defender and the core ML and data science team developing ML/LLM-based protection, telemetry-driven investigations, and automation to defend customers at scale.

Responsibilities

  • Investigate, analyze, and learn from ongoing cybersecurity attacks in order to develop durable detection and prevention solution/strategies across the kill-chain or product/OS enhancements.
  • Shares and leads within team.
  • You will primarily be running telemetry-based attack investigations and threat hunting mixed with light reverse-engineering.
  • Design, code, and maintain client-side and cloud machine learning and automation systems that powers cybersecurity protection in our products and services.
  • Experiment with and apply large language models and agentic systems to protect our customers and improve our internal systems.
  • Supports the management of incidents by applying technical knowledge to diagnose and triage issues with a commitment to maintaining the quality of products and services.
  • Takes notes during incidents and participates in postmortem and root-cause analysis processes.
  • Work with other internal and external teams to forge new and improve existing partnerships that help mature the product.

Qualifications

  • Doctorate in Statistics, Mathematics, Computer Science, Computer Security, or related field OR Master's Degree in Statistics, Mathematics, Computer Science, Computer Security, or related field AND 3+ years experience in software development lifecycle, large-scale computing, threat analysis or modeling, cybersecurity, vulnerability research, and/or anomaly detection.
  • OR Bachelor's Degree in Statistics, Mathematics, Computer Science, Computer Security, or related field AND 4+ years experience in software development lifecycle, large-scale computing, threat analysis or modeling, cybersecurity, vulnerability research, and/or anomaly detection.
  • OR equivalent experience.

Skills

Required:Telemetry-based attack investigationsMachine learning / automation systemsIncident management and postmortem analysis
Nice to have:Reverse engineeringLarge language models / agentic systems
Last updated Oct 16, 2026. Interested? Apply on the company site.

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