Principal Penetration Testing Engineer
Microsoft
Posted on May 29, 2025
Principal Penetration Testing Engineer
London, United Kingdom
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Date posted
May 29, 2025
Job number
1825436
Work site
Up to 50% work from home
Travel
0-25 %
Role type
Individual Contributor
Profession
Security Engineering
Discipline
Penetration Testing
Employment type
Full-Time
Overview
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.
Are you passionate about uncovering hidden vulnerabilities in complex systems and exploring new techniques for ethical hacking? Do you thrive on discovering post-exploitation methods for lateral movement across networks? Are you fascinated with staying current on computing threats? If so, the Regulated Industries Pentest Team at Microsoft is looking for you.
As a Principal Penetration Testing Engineer, you will be at the forefront of securing Microsoft products and services. Our team conducts manual assessments of products, services, and software within regulated industries, ensuring the highest levels of security. You'll play a pivotal role in streamlining workflows, enhancing team processes for greater efficiency and scalability, and providing innovative solutions to complex problems.
Join us in this exciting opportunity to collaborate with some of the brightest minds in the industry and help shape the future of cybersecurity at Microsoft. Your intelligence, creativity, and dedication will be key to elevating our organization's security standards
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.
Qualifications
• Experience in identifying security vulnerabilities, software development lifecycle, large-scale computing, modeling, cyber security, and anomaly detection.
• Experience on penetration testing/red-teaming, cloud, services and network security.
• Strong coding skills, including any of the following languages: C#, Python, C++, Go, PowerShell, ASP.NET, JavaScript
Preferred Qualifications:
• Master’s degree in computer science, software engineering, information security or equivalent work experience.
• GPEN, GWAPT, GXPN, OSCP, OSCE, or similar certifications
• Proven ability to quickly learn about new attack vectors and creativity to identify new threats.
• Effective collaboration skills and ability to deal with ambiguity.
• Experience with Advanced Persistent Threat (APT) emulation, purple teaming, and/or working with threat intelligence
• Experience exploiting bugs and bypassing security mitigations in operating systems
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 and credit history analysis upon hire/transfer and every year thereafter
#RISO #RIPENTT #MSFTSecurity
Responsibilities
- Plan, research, and execute testing of computer systems and applications to simulate real world attacks on Microsoft’s services and infrastructure.
- Assess existing security capabilities to detect and respond to emerging threats.
- Outline and document risk impacts in executive summary reports and communications to relevant stakeholders.
- Perform research to stay current with penetration testing tools, methodologies, tactics, and mitigations.
- Participate as an infrastructure/operation specialist in overt penetration testing engagements, where we emulate real-world adversaries, During Purple Team engagements
- Develop and maintain penetration testing procedures and methodologies.
- Conduct research to remain updated with the latest in application security, both offensive and defensive techniques. Use these findings to educate and raise awareness within the Microsoft Security Community
Benefits/perks listed below may vary depending on the nature of your employment with Microsoft and the country where you work.
Industry leading healthcare
Educational resources
Discounts on products and services
Savings and investments
Maternity and paternity leave
Generous time away
Giving programs
Opportunities to network and connect
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 and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.