New 
Principal Security Researcher
 Microsoft | |
 United States, Washington, Redmond | |
 Oct 22, 2025 | |
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OverviewSecurity 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 is 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, a theme of inspiring excellence, and encouraging teams and leaders to bring their best each day. In doing so, we create life-changing innovations that impact billions of lives around the world. Join the Security Platform and AI Org and help shape the future of Microsoft's defenses. Are you a systems-level thinker who can outmaneuver adversaries and ship protections at planet scale? Are you passionate about securing consumers and enterprises alike? Become an integral member of the Security Platform and AI team. Our mission is to ensure Microsoft's rapidly evolving security and AI tools have the highest bar for safety and security. We're hiring a Principal Security Researcher to serve as a local expert in threat modelling, secure coding and AI deployment, and risk evaluation. You'll develop and lead cross-functional security programs, partner with Microsoft-wide security and safety initiatives, be at the forefront of securing AI tools like Security Copilot, and building strong relationships with the engineering teams to get ahead of problems rather than just reacting to them. 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. This Hybrid Position is located at our Microsoft office in Redmond, Washington. Relocation support will be provided, and successful candidates will need to relocate or reside within 50 miles of the field location.
ResponsibilitiesLead advanced security research into threat management for new AI tools like Security Copilot and our security data lake Sentinel Graph.Design and validate mitigations by partnering with engineering teams to translate research findings into shipped protections.Investigate critical security issues (root cause, motivation, impact) and elevate findings to influence product and strategy decisions.Drive cross-functional collaboration with internal teams and external partners (industry, academia, government) to advance security standards.Publish responsibly and patent IP to strengthen Microsoft's security leadership while balancing disclosure risk.Mentor and guide researchers and engineers, fostering technical growth and alignment with Microsoft's security priorities.Influence organizational best practices by synthesizing research into actionable recommendations and driving adoption.Develop detection and hunting strategies leveraging telemetry, threat intelligence, and advanced analytics.Champion innovation in proactive defense, including AI-assisted security research and automation.Represent Microsoft externally through thought leadership, conference talks, and contributions to the security research community. | |