Senior Security Researcher

Microsoft Microsoft · Big Tech · Redmond, WA +2 · Security Research

This role involves threat hunting to detect, investigate, and respond to advanced attacks using Microsoft 365 Defender. It requires exploring large datasets to uncover novel attack techniques, generating custom alerts, and collaborating with data science and threat research teams to develop cloud-based detections. The role also involves building hunting tools and automations.

What you'd actually do

  1. Explore and correlate large data sets to uncover novel and sophisticated attack techniques, monitor and catalog changes in activity group tradecraft, and generate custom alerts for enterprise customers.
  2. Work with customer support teams to support investigation and response during an enterprise’s time of need.
  3. Collaborate with our data science and threat research teams to develop and maintain accurate and durable cloud-based detections.
  4. Build hunting tools and automations for use in the discovery of human adversaries.

Skills

Required

  • 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.
  • equivalent experience.
  • Ability to meet Microsoft, customer and/or government security screening requirements

Nice to have

  • Doctorate 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 Master's Degree in Statistics, Mathematics, Computer Science, Computer Security, or related field AND 6+ 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 8+ years experience in software development lifecycle, large-scale computing, threat analysis or modeling, cybersecurity, vulnerability research, and/or anomaly detection.
  • equivalent experience.
  • 4+ years of experience in a technical role in the areas of Security Operations, Threat Intelligence, Cyber Incident Response, or Penetration Testing/Red Team.
  • Knowledge of operating system internals and security mechanisms.
  • Experience analyzing attacker techniques that leverage email and cloud-service tactics.
  • Skilled working with extremely large data sets, using tools and scripting languages such as: Excel, SQL, Python, Splunk, and PowerBI.
  • Candidates should have knowledge of operating system internals, security mitigations, and security challenges across Windows, Linux, Mac, Android, and iOS platforms.
  • Familiarity with the kill‑chain model, the MITRE ATT&CK framework, and modern penetration testing techniques is expected.
  • Cross‑group collaboration and communication skills are required, with the ability to clearly articulate the business need for detection improvements.
  • Knowledge of major cloud and productivity platforms, identity systems, and associated security concerns.
  • Experience curating threat intelligence, engaging directly with customers in service delivery roles, and using data to tell a clear story is important.
  • Backgrounds in reverse engineering, DFIR, incident response, or machine learning models are also valuable.
  • Experience with system administration in large enterprise environments—including Windows and Linux systems, network administration, and cloud administration

What the JD emphasized

  • Microsoft Cloud Background Check
  • verification of U.S. citizenship
  • citizenship‑based restrictions

Other signals

  • threat hunting
  • advanced attacks
  • security signals
  • hunting tools and automations
  • custom alerts