Senior Detection Engineer Microsoft Sentinel

Design advanced KQL detections for Microsoft Sentinel and Defender XDR within PSP Investments’ hybrid model, supporting global cyber defense operations. Work from Montreal four days weekly, collaborating with hunters, responders, platform teams, and a managed security provider.

As Senior Developer, Threat Defense and Detection Engineering, you will turn intelligence and testing recommendations into production use cases. You will engineer detections, preventive controls, telemetry coverage, and automations across Microsoft Sentinel, Defender XDR, CrowdStrike Falcon, and Azure DevOps. The position requires strong cybersecurity engineering and operational judgment.

Key Responsibilities:

• Write scalable KQL detections for Sentinel and Defender XDR
• Implement controls, rules, and signatures in security tools
• Test, document, and release detection code through Azure DevOps
• Support production detections, connectors, playbooks, and incident response
• Measure ATT&CK coverage, false positives, and catalogue performance

Requirements:

• Five years of hands-on cybersecurity experience
• Advanced KQL and Microsoft Sentinel enterprise experience
• Python, PowerShell, Git, code review, and CI/CD practice
• Experience with SIEM, EDR/XDR, IDS, and CrowdStrike Falcon
• Bachelor’s degree or equivalent experience; English and French bilingualism

Apply detection engineering, KQL, and security automation expertise to strengthen PSP Investments’ global threat defense capabilities.