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Principal Security Engineer

Microsoft· Penetration Testing
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Sydney, AustraliaFull-timePosted 4d ago

About the role

Principal Security Engineer focused on offensive security and security engineering & mitigations for Windows. Hands-on role uncovering novel attack vectors, developing proof-of-concept mitigations, and partnering with Windows product engineering to design durable, scalable defenses for Windows client and server OS security.

Responsibilities

  • Build reusable agents and tools to expedite and improve the consistency and quality of security reviews.
  • Review features and code for security defects and architectural risk using agents and automated tools built by you and others.
  • Be the security contact for teams building new innovative products and technologies in the next version of Windows and devices.
  • Identify security vulnerabilities in a wide variety of key OS features such as network protocols, security features, and Microsoft devices; leverage a broad and current understanding of security to devise new protections.
  • Interact with the external security community and security researchers.
  • Collaborate with product teams to improve security, and articulate the business value of security investments.

Qualifications

  • Master's Degree in Statistics, Mathematics, Computer Science, or related field AND 4+ years experience in security or related field OR Bachelor's Degree in Statistics, Mathematics, Computer Science, or related field AND 6+ years experience in security or related field
  • OR equivalent experience.

Skills

Required:Security reviewsPenetration testingC/C++OS security fundamentals
Last updated Oct 23, 2026. Interested? Apply on the company site.

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