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Principal Applied Scientist

Microsoft • Redmond, WA, US • published 2026-09-28 02:55:06.861419

Description

**Overview** The Online Forensics team sits within the Microsoft AI Experiences organization, where we protect the monetization network that funds the products people use every day. Because attackers adapt quickly, effective defense must anticipate emerging abuse—not just respond to incidents. You will establish authoritative ground truth on fraud, surface evolving tactics, identify vulnerabilities before they are exploited at scale, and produce the signals, datasets, and test scenarios partner defense teams need. As a **Principal Applied Scientist** on the Online Forensics team, you will shape the scientific strategy for protecting Microsoft’s monetization network. You will assess threats in monetization and advertising flows and LLM\-native systems, track adversary behavior and infrastructure, design safe adversarial simulations, and develop test harnesses and investigation platforms that expose blind spots early. When material incidents occur, you will lead rigorous reconstruction and convert validated findings into labeled ground truth, candidate signals, and regression scenarios that partner defense teams can use to strengthen defenses. Microsoft’s mission is to empower every ...

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