Microsoft

Microsoft

Posted via Microsoft Careers

Senior Security Engineer and Principal Security Engineer (Multiple Positions)

Posted Aug 6, 2026

Role at a glance

Salary
$119.8K – $234.7K/yr
Location
Redmond, Washington, United States
Work arrangement
On-site
Employment
Full-time
Experience
3+ years experience in security or related field
Education
Bachelor's, Master's

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Role Summary

AI-generated

The Windows Security team secures Windows client and server operating systems and devices through offensive security, security engineering, and systematic mitigations. This role develops attack research and defenses and partners with Windows product engineering teams to strengthen the security posture of OS platforms.

What You'll Do

  • Build reusable agents and tools to improve the consistency and quality of security reviews.
  • Review features and code for security defects and architectural risk using agents and automated tools.
  • Serve as the security contact for teams building new products and technologies in Windows and devices.
  • Identify security vulnerabilities in OS features such as network protocols, security features, and Microsoft devices.
  • Devise new protections based on a broad and current understanding of security.
  • Collaborate with product teams to improve security and articulate the business value of security investments.

Generated from the employer's posting. Verify important details before applying.

View full posting

Qualifications

Master's or bachelor's degree in Statistics, Mathematics, Computer Science, or a related field, with the specified security or related-field experience; equivalent experience is also accepted. Ability to meet Microsoft, customer and/or government security screening requirements is required.

Required

  • Master's Degree in Statistics, Mathematics, Computer Science, or related field
  • Bachelor's Degree in Statistics, Mathematics, Computer Science, or related field
  • 3+ years experience in security or related field
  • 4+ years experience in security or related field
  • Ability to meet Microsoft, customer and/or government security screening requirements

Preferred

  • 2+ years identifying vulnerabilities in operating systems and/or native (C/C++) applications.
  • 5+ years of experience in a software engineering or security-related engineering.
  • Demonstrated experience in security research, especially around vulnerability discovery.
  • Experience exploiting bugs and bypassing security mitigations in operating systems.
  • Familiarity with Microsoft Windows architecture.

Original job description

Content provided by the employer

Overview

 

The Microsoft Windows Security team is looking for learn-it-all security engineers that will help secure Microsoft Windows products and devices, with focus on offensive security and security engineering & mitigations for Windows.

The Windows Security team is responsible for securing the Windows client and server operating systems, used by billions of customers every day and in businesses worldwide. This team performs security design reviews, code reviews, penetration testing, vulnerability research and driving systematic mitigations to security risks on Windows to make sure they meet the highest possible security standards and proactively defend cybersecurity threats. This role is hands-on, technically demanding, and central to strengthening the security posture of OS platforms.  

In this role, you will uncover novel attack vectors, develop proof-of-concept mitigations, and partner directly with Windows product engineering teams to design durable & scalable defense. The successful candidate will have hands-on experience with native code (C/C++), penetration testing (code audit, writing fuzzers, finding creative ways to break assumptions), a clear understanding of OS security fundamentals, computer science skills, and a passion for keeping Microsoft customers safe. 

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
  • 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

Required Qualifications:

  • Master's Degree in Statistics, Mathematics, Computer Science, or related field AND 3+ years experience in security or related field
    • OR Bachelor's Degree in Statistics, Mathematics, Computer Science, or related field AND 4+ years experience in security or related field
    • OR equivalent experience.
  • Other Requirements: Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include but are not limited to the following specialized security screenings:

    • Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter. 

Preferred 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.
  • 2+ years identifying vulnerabilities in operating systems and/or native (C/C++) applications. 
  • 5+ years of experience in a software engineering or security-related engineering. 
  • Demonstrated experience in security research, especially around vulnerability discovery. 
  • Experience exploiting bugs and bypassing security mitigations in operating systems.
  • Familiarity with Microsoft Windows architecture.  

#W+DJobs



Penetration Testing IC4 - The typical base pay range for this role across the U.S. is USD $119,800 - $234,700 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $160,200 - $261,000 per year.

Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:
https://careers.microsoft.com/us/en/us-corporate-pay

Penetration Testing IC5 - The typical base pay range for this role across the U.S. is USD $142,800 - $274,800 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year.

Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:
https://careers.microsoft.com/us/en/us-corporate-pay


This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.



Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.

Microsoft

About the company

Microsoft

Large Enterprise

Microsoft is a global technology leader that empowers individuals and organizations to achieve more through innovative software, services, and devices. Founded in 1975, the company is best known for its flagship products like the Windows operating system and Microsoft Office suite. In addition to personal computing, Microsoft is a leader in cloud computing with its Azure platform, providing a range of solutions for businesses to enhance productivity and efficiency. With a strong commitment to sustainability and accessibility, Microsoft continues to drive technological advancements that shape the future of work and learning.