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Principal Security Researcher

Microsoft


Job Location:

Cheltenham - UK

Yearly Salary: GBP 93500 - 161800
Posted: 5 October 2026 (3 days ago)
Application Deadline: 2 January 2027
Vacancies: 1 Vacancy

Job Summary

Overview

The Cloud & AI organization accelerates Microsofts 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 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.

Do you have a passion for helping Microsofts clients defend themselves against targeted exploitation Are you interested in being intimately involved in the latestcutting-edgedevelopments in the security industry and having a direct impact on the security of all Microsoft customers Do you want to be on the front lines of helping our customers go toe-to-toe against advanced adversaries Are you interested in a fast-paced job full of new opportunities If that resonates consider joining us as a Security Researcher on the Global Hunting Oversight and Strategic Triage (GHOST) team! We are looking for an experiencedPrincipalSecurity Researcher with aDigital Forensics and Incident Responsebackground to join our team to perform threat huntsassistwith investigations develop threat intelligence and to cultivate investigation best practices into Microsoft tooling and products. Researchers will support a global team toidentifyandcatalognew attacker TTPs victims and deliver customer notifications to protect worldwide enterprise customers and empower customers to protect themselves via constantly improving Microsoft products.

Microsofts 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 alignment with our Microsoft values we are committed to cultivating an inclusive work environment for all employees to positivelyimpactour culture every day. Microsofts 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 alignment with our Microsoft values we are committed to cultivating an inclusive work environment for all employees to positivelyimpactour culture every day.



Responsibilities

This role is part of a collaborative team assisting our customers with:

  • Leading technical workstreams during investigationsand guidingothers to conductdeep analysis of attacker activity in on-premises and cloud environments.

  • Identifyingpotential threats allowing for proactivedefensebefore an actual incident

  • Presenting technical findings andrecommendations to improve customers cybersecurity posture and performing threat intelligence knowledge transfer to prepare customers to defend against todays threat landscape

  • Definingthe requirements forandassistingin the development of productionthreat hunting tools automations and new capabilities.

  • Drivinginvestigation strategy develop new hunting methodologies and influence security products and practices across multiple teams

  • Mentoringothers helping the team to upskillinterms of both hard and soft skills.



Qualifications

Required qualifications:

  • Extensive and demonstrated professional experience in Threat Hunting Incident Response (DFIR) Threat Intelligence or Security Research.

  • Experience investigating sophisticated cyber threats including APT or nation-state activity.

  • Extensive experience working withforensically collected data(and tooling)security telemetrylogsand SIEM platforms.

  • ExpertiseinKQL or equivalent query languages (SplunkHumio Kibana etc.).

  • Experience with EDR and security monitoring technologies such as Microsoft Defender Microsoft Sentinel CrowdStrike or similar platforms.

  • Experiencemanaging or conducting security review of Microsoft Azure tenants Microsoft 365 andEntra ID.

  • Proven ability to analyze security data to investigate attacker activity and derive identify indicators of compromise (IOCs) indicators of activity (IOAs) and TTPs.

  • Experience and familiarity with the collection of Digital Forensic data as well as case management and forensic analysis tooling such as X-Ways Forensics.

  • Excellent written and verbal communication skills in English and ability to work in a global team environment

  • Ability to obtain and maintain a UK Security Clearance.

Preferred qualifications:

  • Industry certifications in cybersecurity DFIR incident response or threat hunting (e.g. CISSP GIAC).

  • Experience across multiple cybersecurity disciplines including threat hunting incident response digital forensics and threat intelligence.

  • Experienceleading technical workstreamsin Incident Response scenarios.

  • Extensive knowledge of Microsoft security technologies including Defender and Sentinel.

  • Extensive knowledge of MicrosoftEntra ID.

  • Experienceanalyzinglarge-scale security telemetry and hunting across enterprise environments.

  • Understanding of scripting or the ability to read and interpret code and automation workflows.



Security Research IC5 - The typical base pay range for this role across United Kingdom is 93500.00 - 161800.00 per year. Certain roles may be eligible for benefits and other compensation.

Find additional benefits and pay information here:
Research IC5 - The typical base pay range for this role across United Kingdom is 93500.00 - 161800.00 per year. Certain roles may be eligible for benefits and other compensation.

Find additional benefits and pay information here:
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.


Required Experience:

IC