Cybersecurity Threat Hunter

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 products, services and partnerships.   Microsoft's Detection and Response Team (DART) is seeking a skilled and experienced Cybersecurity Threat Hunter to join the team in Japan. DART is the first port of call for many customers during a security incident. This pivotal, customer-facing position identifies adversary activity, determines compromise scope and turns findings into clear response actions.   You will lead hypothesis-driven hunts, establish technical priorities and act as a trusted technical partner for customers during urgent response activity. Working with lead investigators, infrastructure engineers, reverse engineers and incident coordinators, you will help customers understand adversary activity, visibility gaps and durable security improvements.   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.

As a Cybersecurity Threat Hunter, you will lead evidence-driven hunt workstreams across customer environments, identify adversary activity and communicate clear findings, confidence and response recommendations.   Set hunt objectives, hypotheses, priorities and evidence requirements using threat intelligence, adversary tactics, techniques and procedures, and customer-specific risk context.   Develop, test and refine hunts using large-scale correlation of endpoint, cloud, identity, network and third-party telemetry.   Operate as a platform- and vendor-agnostic hunter across Windows, Linux, macOS, multi-cloud and third-party technologies, using the telemetry, forensic artefacts and security tooling required by each customer environment.   Determine adversary presence, compromise scope and visibility gaps; establish what is known, what remains uncertain and what additional collection or analysis is needed.   Author and optimise queries, automation and responsible AI-enabled workflows to improve hunt scale, analytical quality and time to detection.   Convert investigations and research into durable detections, analytics, mitigations, threat intelligence and product or architectural improvements.   Lead multiple hunt workstreams during high-impact incidents, coordinate priorities and dependencies, maintain evidentiary documentation and support post-incident and root-cause analysis.   Brief customer technical teams, executives, internal stakeholders and partners with clear findings, coverage, limitations and response options.   Provide technical guidance, share research and mentor junior hunters while protecting DART information, tools and operational security.

Required / Minimum Qualifications   Doctorate in Statistics, Mathematics, Computer Science, Computer Security or related field OR Master's Degree in Statistics, Mathematics, Computer Science, Computer Security or related field AND experience in software development lifecycle, large-scale data analysis or security research; OR equivalent practical cybersecurity experience.   Demonstrated hands-on experience in threat hunting, Windows forensics, Linux or macOS analysis, or investigating identity-based attacks across Active Directory, Entra ID or other enterprise identity platforms.   Demonstrated experience authoring queries against large-scale security telemetry, including scripting or automation.   Ability to correlate and assess evidence from multiple sources, identify compromise scope, assess visibility gaps