Senior Security Research Engineer-Microsoft Defender Experts Team

Microsoft Corporation
📍 San José, Costa Rica, Costa Rica 💼 Full-time 🕒 Posted February 28, 2026

Job Description

**Overview**

Microsoft Defender Experts Team is looking for an experienced professional to join our detection and response team. No matter how sophisticated attacker behaviors become, Microsoft 365 Defender will help enterprises detect, investigate, and respond to advanced attacks and data breaches on their networks. Our team uses deep knowledge of the attacker landscape and rich telemetry from our sensors to perform root-cause analysis and generate custom alerts, ensuring that Microsoft 365 Defender customers are well equipped to quickly respond to human adversaries identified in their unique environments.

Ensuring that no human adversary can operate silently begins with experts harnessing the powerful optics provided by Microsoft 365 Defender, across the attacker kill-chain, coupled with world-class detections. We are looking for someone who is passionate about this work to help us harness the power of Microsoft’s trillions of security signals to quickly identify an...

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Job Details

  • Location San José, Costa Rica
  • Job Type Full-time
  • Category other-general
  • Posted Date February 28, 2026
  • Application Deadline March 05, 2026