Senior Data Scientist

Security represents the most critical priorities for our customers in a world awash in digital threats, regulatory scrutiny, and estate complexity. Microsoft Security aspires to make the world a safer place for all. We want to reshape security and empower every user, customer, and developer with a security cloud that protects them with end-to-end, simplified solutions. The Microsoft Security organization accelerates Microsoft's mission and bold ambitions to ensure that our company and industry are securing digital technology platforms, devices, and clouds in our customers' heterogeneous environments, as well as ensuring the security of our own internal estate. Our culture is centered on embracing a growth mindset, inspiring excellence, and encouraging teams and leaders to bring their best each day. The Microsoft Identity Security data organization is responsible for building and operating large-scale data science, machine learning, and AI-driven systems that protect users and systems from compromise, fraud, and abuse across Microsoft platforms. As a Senior Data Scientist, you will design, build, and ship production machine learning and applied AI systems, including classical ML detections and emerging LLM- and agent-based protections that stop malicious actors targeting billions of Microsoft customers. You will own problems end-to-end: framing the detection question, exploring telemetry at scale, building and evaluating models, driving them into production, and monitoring their real-world impact. You will partner closely with software engineering, product management and security researchers. Do you love big data and the hard problems it creates? Do you want to apply your ML and applied AI skills to protect millions of customers from real adversaries? Then this role is for you.