Senior AI Security Researchers

Senior AI Security Researchers

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Senior AI Security Researchers

United States, Washington, Redmond

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Job description

Company and benefits

Job number

200063327

Date posted

Oct 22, 2026

Work site 3 days / week in-office

Travel Less than 25%

Profession Security Engineering

Discipline Security Research

Role type Individual Contributor

Employment type Full-Time

Overview

Security is one of the most critical priorities for our customers in a world of growing digital threats, regulatory scrutiny, and estate complexity. Microsoft Security aspires to make the world safer by empowering every user, customer, and developer with a security cloud that delivers end-to-end, simplified protection. The Microsoft Security organization advances this mission by helping secure digital technology platforms, devices, and clouds across customers' heterogeneous environments, while also protecting Microsoft's internal estate. Our culture is grounded in a growth mindset, inspiring excellence, and enabling teams and leaders to bring their full potential each day.

The Microsoft Security Research (MSecR) conducts security research at the intersection of offense, defense, and intelligence. AI is now everywhere: organizations and people across every industry are adopting large language models, copilots, and autonomous agents, and these systems bring a brand-new attack surface that can be manipulated, misused, and exploited in ways traditional software cannot. In Microsoft Security, we protect AI from these attacks. We are looking for a Senior Security Researcher and a Principal Security Researcher who combines a real security background with a deep, hands-on understanding of how modern AI works and how it breaks. You will help execute and conduct AI attacks through simulations, using what you find to make AI safer and to inform our security products so they protect customers better. This role is for someone who wants to shape how AI attacks are simulated and defended at scale. You will set methodology, build tooling, influence product direction, and drive innovation in attacking and defending AI systems (Security for AI). 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.

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

As a Senior AI Security Researcher, you will:

• Lead the design and execution of simulations aimed at making AI safer, conducting realistic AI attacks whose findings inform our security products and help them protect customers more effectively.
• Develop and execute hands-on attacks against AI systems, including:
• 1. Direct prompt injection and jailbreaks that bypass system prompts, safety instructions, and alignment.
• 2. Indirect (cross-domain) prompt injection (XPIA), where malicious instructions are hidden in untrusted content the model consumes: documents, web pages, emails, tickets, code, and RAG sources.
• 3. Multi-turn, crescendo, and social-engineering