Principal Security Researcher – Microsoft Red Team
Microsoft Corporation
Cheltenham, United Kingdom
Job posting number: #7311908 (Ref:ms-1837431)
Posted: July 2, 2025
Job Description
Security 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.
Security 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.
Do you want to find and exploit security vulnerabilities that impact hundreds of millions of users? Join the Microsoft Red Team where you'll join the red teaming side of security and emulate real-world attacks against Microsoft. We help ensure Microsoft is ready to face and respond to even the most determined adversaries by exploring new ways to find and prevent security flaws.
We are looking for a Principal Security Researcher to work alongside other Security Researchers and Penetration Testers experienced in identifying and exploiting vulnerabilities in all layers of the services including application, cloud, network, and operational security domains. You will also collaborate across Microsoft with developers and security personnel from multiple teams. By adopting the tactics, techniques, and procedures of potential attackers, you will provide critical insights that empower our security teams to strengthen defenses and protect against the evolving landscape of digital threats.
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.
In alignment with our Microsoft values, we are committed to cultivating an inclusive work environment for all employees to positively impact our culture every day.