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Microsoft UK • Cheltenham, United Kingdom

Senior Security Researcher

Employment type:  Full time
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8.4

/10

Transparency ranking

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Job Description

Overview

The Cloud & AI 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. Microsoft is one of the largest enterprise service companies in the world.

Are you passionate about identifying and security vulnerabilities that impact hundreds of millions of users across the world? Join the Microsoft Red Team (MRT) organization, where you will emulate real-world advanced persistent threats against Microsoft. Our mission is to ensure Microsoft is prepared to face and respond to even the most determined adversaries by exploring innovative ways to identify and prevent security flaws.

We are looking for a Senior 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. 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.



Responsibilities

  • Research and discover zero-day vulnerabilities in cloud environments and associated technologies.
  • Develop and implement proof-of-concept exploits to demonstrate potential risks and work closely with engineering teams to address findings.
  • Analyze a wide array of data sources to identify potential security weaknesses and breach points within Microsoft’s infrastructure
  • Develop tools and techniques to scale and accelerate adversary emulation and vulnerability discovery
  • Partner with operational teams to execute targeted attacks on these systems, simulating real-world threat scenarios
  • Advocate for security change across the company through building partnerships and clearly communicating impact of risks
  • Embody our culture and values


Qualifications

  • Proficient years of hands-on experience in vulnerability security research

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.

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.

Company benefits

Wellbeing allowance
Health insurance
Dental coverage
Gym membership
Mental health platform access
Buy or sell annual leave
Shared parental leave
Charity donation scheme
Employee assistance programme
Employee discounts
Volunteer days – 3 days a year
Fertility treatment leave
Open to compressed hours
Open to job sharing
Fertility benefits
Enhanced sick pay
Enhanced sick days
Compassionate leave
Travel insurance
20 days annual leave + bank holidays
Enhanced maternity leave – 26 weeks paid
Enhanced paternity leave – 6 weeks paid
Adoption leave – 24 weeks paid
Childcare credits
Carer’s leave – 4 weeks paid
Cycle to work scheme
Faith rooms
Annual bonus
Annual pay rises
Company car
Hackathons
Open to part-time employees
Pregnancy loss leave
Life insurance
Equity packages
Financial coaching
Relocation packages
Sabbaticals
Enhanced pension match/contribution
Family health insurance
LinkedIn learning license
In house training
Personal development days

Working at Microsoft UK

Company employees

Globally: 228,000

Gender diversity (male:female)

67:33

Currently hiring in

Ireland

United Kingdom

Office Locations

Awards & Accreditations

Family Friendly

Family Friendly

Flexa awards 2025
Career Progression

Career Progression

Flexa awards 2025
Most flexible companies

Most flexible companies

Flexa100 2024

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