Security Research Engineer

Security represents one of the most critical priorities for customers operating in today’s complex and rapidly evolving threat landscape. Microsoft Security is dedicated to making the world a safer place by delivering an integrated security cloud that protects users, developers, and organizations with end‑to‑end, simplified solutions. Our mission is to secure digital platforms, devices, applications, identities, and cloud environments across heterogeneous customer ecosystems while also protecting Microsoft’s own internal estate. Within this mission, the Defender Experts (DEX) team plays a vital role by delivering expert‑led cybersecurity investigations at scale. Using rich telemetry and signals from Microsoft 365 Defender and other Microsoft security technologies, DEX helps customers rapidly understand, validate, and respond to suspicious or malicious activity. Our work gives organizations the clarity and confidence they need to strengthen their security posture. We are seeking a Senior Security Analyst (Tier 2) with strong experience in security investigations, attacker tradecraft analysis, and multi‑signal correlation. In this role, you will analyze complex security data, apply deep knowledge of the threat landscape, and determine whether activity represents a real threat. You will deliver clear, actionable findings and recommendations that help customers protect their environment. This role requires strong investigative skills, critical thinking, and the ability to differentiate benign from malicious behavior with confidence. This position is ideal for experienced cybersecurity professionals who thrive on analytical problem‑solving, attacker behavior research, and meaningful customer‑focused security work. It is a great opportunity for individuals motivated by impact, learning, and continuous improvement.