New 
Principal Security Researcher - Offensive Security & Purple Team Lead
 Microsoft | |
 United States, Texas, Irving | |
| 7000 State Highway 161 (Show on map) | |
 May 14, 2025 | |
|
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. We are seeking a Principal Security Researcher to lead offensive security and purple team initiatives within Microsoft's Threat Protection organization. This role is ideal for a seasoned security expert who thrives at the intersection of red and blue teaming, and who is passionate about using adversary simulation, detection engineering, and AI-driven insights to protect billions of users. You will play a key role in building and scaling a Purple Team hub, driving high-impact engagements that test and improve Microsoft Defender's detection and response capabilities. 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.
ResponsibilitiesLead the design and execution of advanced adversary emulation campaigns. Build and mentor a high-performing purple team focused on offensive testing and detection validation. Collaborate with red teams, detection engineers, and threat intelligence teams to identify and close detection gaps. Apply generative AI and LLMs to simulate attacker behavior and enhance detection logic. Translate offensive findings into actionable improvements across Microsoft Defender and Sentinel. Contribute to internal tooling, automation, and knowledge sharing across the security organization.Embody our culture and values | |