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Thales

Global defense and aerospace electronics

Cybersecurity Detection Specialist

Security Operations & Incident ResponsePosted on Nov 13
Full-timeÉlancourt, FranceNo salary listedHybrid

About the Job

Requirements

  • Graduated from an engineering school or equivalent.
  • At least 3 years of experience detecting security incidents.
  • Mastery of the SEKOIA solution, including implementing and modifying rules, writing use cases and reflex sheets, processing alerts, and investigating true-positive tickets.
  • Interest in automation, particularly artificial intelligence, and understanding its value for detection needs.
  • Interest in cybersecurity challenges, cybercriminal and state-sponsored threats, and cyber defense.
  • Mastery of the SEKOIA SIEM/SOAR tool.
  • Experience with at least one EDR solution, such as Harfanglab, SentinelOne, CrowdStrike, or Microsoft Defender for Endpoint.
  • Good knowledge of cybersecurity, including vulnerabilities, threats, and current developments.
  • Broad knowledge of systems and network infrastructures.
  • Good written and spoken English is essential for some international projects.

Responsibilities

  • Serve as the technical reference for SEKOIA and support team members in developing their skills.
  • Design, evolve, and optimize detection matrices and rules.
  • Ensure the coverage and depth of monitoring, including through the MITRE ATT&CK framework.
  • Contribute to defining and evolving detection and data-collection strategies.
  • Integrate new environments into monitoring and continuously improve detection capabilities.
  • Deploy and tune detection rules within SIEM platforms.
  • Support clients in steering committees and technical-assistance engagements.
  • Contribute to automating and industrializing detection methods and tools.

Desired Qualifications

  • Knowledge of GitLab, Python, Bash, and/or a SANS certification is an advantage.

About the Company

Thales

Global defense and aerospace electronics

Thales designs and delivers critical technology for aerospace, defense, and digital security. Its products include electronics, software, and data-security systems that power air travel, payments, and modern military platforms, by integrating hardware and software to build systems such as avionics, radar, cybersecurity, and secure communications that collect sensor data and protect networks. It stands out through deep industrial experience, end-to-end solutions across defense, aerospace, and cybersecurity, and a focus on AI and quantum tech, aided by strategic acquisitions and partial state ownership. Its goal is to provide reliable, secure, and connected technologies that support national security, public safety, and everyday life by solving complex security and connectivity challenges.

Company size
10,001+
Company stage
IPO
Headquarters
Meudon, France
Founded
1893

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