Senior Threat Hunter - Specialist I - Information Security - Paris

We are looking for a Senior Threat Hunter with strong expertise in Python and Jupyter Notebooks to join our Managed Security Services team in Paris. This role combines advanced threat hunting with engineering capabilities, focusing on building scalable, automated, and repeatable threat hunting frameworks across large datasets in enterprise environments., * Perform proactive, hypothesis-driven threat hunting aligned to MITRE ATT&CK

• Analyze and investigate security data across endpoint, network, and cloud environments
• Identify indicators of compromise, suspicious activity, and emerging threats
• Develop and maintain Jupyter Notebook-based hunting frameworks
• Build reusable Python modules, APIs, and automation tools
• Design and maintain data pipelines for telemetry and threat intelligence integration
• Automate hunting workflows using orchestration tools (e.g., Azure ML pipelines)
• Apply data normalization, validation, and correlation techniques
• Collaborate with SOC, Threat Intelligence, and Detection Engineering teams
• Produce clear and structured threat hunting reports and findings

Do you have experience in Windows?, * 5+ years of experience in Threat Hunting, Detection Engineering, or Incident Response

• Strong hands-on experience with:

• Python (Pandas preferred)
• Jupyter Notebooks

• Experience working with:

• SIEM / EDR / XDR platforms
• Large-scale security telemetry and data analysis

• Strong understanding of:

• MITRE ATT&CK framework and attacker TTPs
• Windows and Linux operating systems
• Network traffic and log analysis

• Experience in cloud threat hunting (AWS, Azure, GCP)
• Good understanding of:

• CI/CD pipelines, SDLC, and automation practices

Preferred Qualifications

• Experience with tools such as Microsoft Sentinel, Defender, CrowdStrike, Cybereason
• Experience building automation for detection validation, rule deployment, or telemetry pipelines
• Relevant certifications such as GIAC, OSCP, or CEH, threat intelligence,incident response,mitre att&ck,penetration testing

UST is a global digital transformation solutions provider. For more than 20 years, UST has worked side by side with the world's best companies to make a real impact through transformation. Powered by technology, inspired by people and led by purpose, UST partners with their clients from design to operation. With deep domain expertise and a future-proof philosophy, UST embeds innovation and agility into their clients' organizations. With over 30,000 employees in 30 countries, UST builds for boundless impact-touching billions of lives in the process.