Security Researcher - Cybersecurity Lead Investigator

Job d:

Location:

United Kingdom, Multiple Locations, Multiple Locations

Employment type:

Full-Time Work site: 0 days / week in-office – remote

Role type:
Individual Contributor Travel: 25-50%
Profession:
Security Engineering Discipline:
Security Research Company:
Microsoft Overview With  more than 45,000 employees and partners worldwide, the Customer Experience and Success (CE&S) organization is on a mission to empower customers to accelerate business value through differentiated customer experiences that leverage Microsoft's products and services, ignited by our people and culture. We drive cross-company alignment and execution, ensuring that we consistently exceed customers' expectations in every interaction, whether in-product, digital, or human-centered.

CE&S is responsible for all up services across the company, including consulting, customer success, and support across Microsoft's portfolio of solutions and products. Join CE&S and help us accelerate AI transformation for our customers and the world.

Microsoft's Detection and Response Team (DART) is seeking a skilled and experienced Cybersecurity Lead Investigator to join the team in United Kingdom. DART is the first port of call for many customers during a security incident. This pivotal, customer-facing role calls for a technically deep and agile investigator who can lead complex, high-impact incident response across on-premises and cloud environments and turn incomplete evidence into clear, defensible response decisions.

You will lead the investigation, establish technical priorities and act as the primary technical point of contact for customers, including executive stakeholders. Working with threat hunters, reverse engineers, infrastructure engineers and incident coordinators, you will bring together investigative findings, and direct response recommendations, balancing investigation with rapid recovery and containment. Incident coordinators support staffing, scheduling and operational escalation; the Lead Investigator owns investigation direction and technical judgement within the agreed engagement scope.

As part of a globally distributed, mission-driven team, you will share research, mentor colleagues and help shape the future of Defender Experts Cybersecurity Incident Response. Microsoft's mission is to empower every person and every organization on the planet to achieve more. Employees are expected to demonstrate a growth mindset, innovation, collaboration, respect, integrity, accountability, and inclusion.

Responsibilities As a Lead Investigator, you will orchestrate evidence-driven investigations and technical incident response, align specialist work streams and communicate clear findings, priorities and recommendations to customers.

Set investigation objectives, hypotheses, priorities and evidence requirements; lead hands-on analysis and specialist work streams across enterprise on-premises and cloud environments.

Contextualise and prioritise findings, correlate disparate evidence and build cohesive incident timelines. Establish what is known, what remains uncertain and what additional collection or analysis is needed.

Assess adversary activity, compromise scope and potential data collection or exfiltration; validate key findings and explain the confidence and limitations of conclusions.

Direct technical response planning and recommendations to secure enterprise environments, balancing containment and recovery urgency with evidence preservation and customer business constraints. Coordinate execution with customer-authorised teams and relevant specialists.

Serve as the primary technical point of contact for complex investigations; brief technical teams, executives, legal, compliance, engineering and other stakeholders with clear…