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Microsoft

# Security Researcher II /Senior Security Researcher - Microsoft Defender (Multiple Roles)

Israel, Multiple Locations, Tel Aviv, Herzliya, Southern, Beer-Sheva, Haifa, Northern, Nazareth Senior individual contributor Research & Science 

Listed on Microsoft’s official careers site. Posted August 10, 2026. Check that it is still open and apply there.
[Apply on Microsoft’s careers site →](https://apply.careers.microsoft.com/careers/job/1970393556959639)

[OpenNash Jobs](https://jobs.opennash.com/) / [Microsoft](https://jobs.opennash.com/companies/microsoft/) / Security Researcher II /Senior Security Researcher - Microsoft Defender (Multiple Roles)

## Job description

Investigate real world advanced attacker TTPs to develop high-fidelity protection signals, and robust logic across complex kill-chains. Design and implement innovative capabilities that autonomously prevent, detect and disrupt sophisticated threats in near real-time. Infuse deep security expertise into the analysis of massive telemetry sets using big-data query languages, reasoning over data to identify novel malicious patterns, and drive evidence-based research decisions.

Partner with engineering and product teams to share research insights, validate protection concepts, and push ideas forward into production-ready protection at a global scale. Contribute expert insights to a strategic feedback loop by analyzing real-world attack data and telemetry to refine protection coverage and accuracy. 4+ years of hands-on experience in security research or threat hunting, with a specialized focus on identity, cloud, or AI-based threat scenarios.

Deep understanding of the threat landscape, including modern attacker techniques and complex kill-chains, with a focus on platform internals across OS, Cloud Workloads and Identity platforms. Experience hunting across diverse signal sources, effectively uncovering threats within on-premises, hybrid, and cloud environments. Programming proficiency (e.g., Python, C#, or similar), with a proven ability to develop and ship production-ready protection logic.Demonstrated ability to work effectively in cross-functional teams, bridging the gap between deep research and scalable engineering.

### Preferred Qualifications

B.Sc. or M.Sc. in Computer Science or Software Engineering OR/AND related field Public track record of security research, such as technical blog posts, whitepapers, or presentations at major industry conferences. Experience in offensive security or adversary simulation.

## At a glance
- Posted by the employer: Aug 10, 2026
- First seen by OpenNash: Aug 21, 2026
- Last checked: Oct 18, 2026
- Listed for: 69 days
- Location: Israel, Multiple Locations, Tel Aviv, Herzliya, Southern, Beer-Sheva, Haifa, Northern, Nazareth[Apply on Microsoft’s careers site →](https://apply.careers.microsoft.com/careers/job/1970393556959639)

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