Come and be part of a dynamic team focused on securing cutting-edge AI and cloud technologies in a rapidly evolving threat landscape. We are leading new initiatives and research projects across _AI Security, Identity Protection,_  and _SaaS Defense_ , and this role offers a unique opportunity to help define the rules of the game. AI is transforming the way we interact with computers and machines and defining new cybersecurity problems and opportunities - we are looking for a Principal Researcher who can help us stay ahead of the curve. In this role, you’ll research and build defenses across AI systems, agentic protocols, Identity platforms, and SaaS applications. One day you might analyze a new class of AI prompt injection attacks or Agents abuse, the next you’ll be hunting through data or creating novel protection mechanisms for them. You’ll work closely with product teams to turn research prototypes into real security features. Join our **threat protection research team** and be part of a team who contributes to Microsoft’s most advanced and innovative **security solutions** . Our mission is to help everyone to counter cyber threats by strengthening their security capabilities across their entire environment, including Identities, Agentic AI systems, Cloud and Applications. _Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond_ **Responsibilities** + Research and develop detection methods for new and advanced attack techniques -from exploits to implants. Build end-to-end PoCs, from offensive testing to scalable detection, across all our cloud and identity platforms. + Stay up to date on the latest attack trends and build strong detections across the kill chain—covering agentic AI & LLM threats, cloudand identity-based attacks. + Collaborate with multiple product and engineering teams to design the next iteration of security products, implement detection ideas and validate their effectiveness using a data-driven approach. + Collaborate with data science teams to drive ML based protections, understand, and identify detection gaps, capabilities, assumptions, and improvements. + Provide cybersecurity expertise as needed during security escalations and incidents to help protect Microsoft and our customers. **Qualifications** + 10+ years of computer security industry experience with knowledge of adversary tradecraft, security operations, incident response, threat hunting, and of emerging threats and techniques for attacks against modern cloud environments.  + 4+ years of experience researching, prototyping, and driving engineering requirements for threat protection systems. + BSc. or M.Sc. in Computer Science, Software Engineering, or relevant practical experience (e.g. service in elite technology unit in IDF). + Code fluency in either C#, Python or Rust. + A drive to tackle hard problems with level of ambiguity. + Strong knowledge of the security threat landscape, with experience in the modern attacker kill chain and MITRE ATT&CK—especially in cloud, application, identity, and AI-related threat scenarios. + Team player – open to ideas and enjoys working with others to achieve shared goals. + Experience leading a project from start to finish—including idea, design, coding, testing, and ongoing maintenance. + Familiarity with cloud environments, and hybrid cloud enterprise services. \#MSFTSecurity #MSFTSecurity #Research #CloudAppAndIdentity #Sec4AI Microsoft is an equal opportunity employer. Consistent with applicable law, all qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations (https://careers.microsoft.com/v2/global/en/accessibility.html) .