Senior Security Engineer

Come work at a place where innovation and teamwork come together to support the most exciting missions in the world!

As a Senior Security Engineer at Qualys, you will play a critical role within our Cyber Fusion Center, driving the design, engineering, and optimization of our defense platforms while leading key initiatives in security engineering, threat detection, and incident response to elevate our platform and corporate security monitoring capabilities.

You will lead the Incident Response (IR) program during US hours, coordinating with SecOps, Legal, and other internal teams at Qualys based on the nature of each incident. You will serve as the primary point of contact for customer communications, initiate external investigations when necessary, and drive the end-to-end IR process to ensure timely and effective resolution.

Key Responsibilities :

Defense Engineering & Automation

• Design, onboard, and normalize data sources into the Elastic SIEM platform.
• Engineer and optimize log ingestion pipelines to improve search performance and query efficiency.
• Develop advanced detection rules mapped to the MITRE ATT&CK framework.
• Continuously tune detection logic to minimize false positives and enhance signal-to-noise ratio.
• Leverage scripting languages (Python, PowerShell, Bash) to automate evidence collection, enrich alerts, and streamline repetitive tasks.
• Integrate threat intelligence feeds into SIEM / SOAR workflows to support proactive detection and response.

Incident Response Support :

Qualifications

Required Experience :

SIEM, SOAR, and EDR / XDR platforms.

Technical Skills :

Preferred Qualifications :

Qualys is an Equal Opportunity Employer, please see our EEO policy .