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Corentin F.CF

Corentin F.

Cybersecurity Expert

€867/day
Redon, FR
8-15 years
Cyber Security
Cyber Threat Intelligence
Technical Analysis
Data Analysis

Average response time: 1 hour

Freelancer profile translated to English.
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About Corentin

Senior Threat Intelligence Analyst, ready to lead or grow a CERT / CTI unit.

Cyber Threat Intelligence Expert — 13+ years in critical environments in Defense, Banking & Industry (Thales, Sopra Steria / EDF, ATOS, La Banque Postale). Building and operating CTI platforms (MISP, ELK, OSINT Python), with a focus on investigation and incident response (phishing, fraud, ransomware). Through his micro-enterprise Sivotis, he develops a proprietary Threat Intelligence platform and operates a private R&D environment including AI applied to cyber (LLM Ops, MCP, A2A agents).
Consulting and Audits
Digital and IT Services
Education Systems, Research, and Universities
Telecommunications
Defense and Military

  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Redon (up to 10km), Vannes (up to 10km), Nantes (up to 10km), Rennes (up to 10km)

Experience

  • La Banque Postale
    THREAT ANALYST — CERT
    BANKING AND INSURANCE
    January 2026 - June 2026 (5 months)
    Nantes, France
    Transitioned to the CERT of the La Banque Postale Group after an N3 SOC mission. Activities conducted within a regulatory framework (DORA, NIS2, and LPM).

    - Mission under security clearance.
    - Conducted comprehensive CTI investigations — phishing, malware, fraud, data breaches, account compromises — within TLP, MITRE ATT&CK, YARA / Sigma rules framework.
    - Analyzed industrialized phishing kits (factory pattern targeting several French banking brands) and high-impact Telegram marketplaces (massive volumes of potential victims).
    - Reverse-engineered multi-platform stealers (Android / Windows) and attributed actors via Git forensics, blockchain analysis (BTC / ETH / SOL), and advanced OSINT.
    - Industrialized threat intelligence gathering (multi-channel OSINT surveillance, stealer-log aggregators) and coordinated takedown escalations (GitHub, CNIL, CERT-FR, Signal Spam, AFNIC).
    - Developed a reproducible CERT methodology — standardized investigation templates and a unique nomenclature; CTI reports aligned with DORA / NIS2 / LPM.
    Open Source Intelligence (OSINT) Threat Analysis Computer Emergency Response Team Incident Response Vulnerability Management
  • ATOS
    SECURITY CONSULTANT
    TECH
    January 2024 - September 2024 (8 months)
    Angers, France
    - Mission under security clearance.
    - Managed the Symantec Endpoint Protection Manager (SEPM) platform for 40,000 workstations.
    - Configured network flows for national and international perimeters.
    - Provided support for the Web Proxy migration project.
    - Implemented global policy changes to meet client requirements.
    - Established a monitoring and alerting system for vulnerability supervision.
    Symantec Endpoint Protection Manager Python Powershell Vulnerability Management
  • Corexalys
    CYBER INTELLIGENCE ANALYST
    CONSULTING AND AUDITS
    January 2020 - January 2023 (3 years)
    Paris, France
    Architected a global multi-source intelligence platform for identifying physical and legal entities.

    - Collected, processed, and identified data (Clear, Deep, and Dark Web) as a threat analyst within the R&D department.
    - Provided operational incident response support to clients against ransomware, cybercriminals, and other threats.
    - Designed and developed information gathering modules to enhance intelligence capabilities.
    - Proactively monitored the threat landscape, with a particular focus on emerging threats.
    - Educated clients on Cyber risks (information leaks, cybersquatting) with a pedagogical and pragmatic approach.
    - Architected a global platform for identifying physical or legal entities from various data sources.
    - Implemented open-source solutions for the company's internal tools.
    - Performed forensic analysis during a search to investigate a potential server compromise.
    - Analyzed AWS logs to assess the extent of user compromise.
    - Performed technical disk analysis to ensure data integrity.
    - Conducted vulnerability scans with Nessus for the client's administrative perimeter.
    Threat Analysis OSINT Technical Analysis Cyber Threat Intelligence Dark Web
Check out Corentin's experience

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Education

  • Engineer's Degree, Chef de Projet International
    ESAIP
    2012
    Engineer's Degree, Chef de Projet International
  • BTS, IT Management
    IIA
    2009
    BTS, IT Management

Certifications

  • CERTIFIED SECURITY ANALYST
    EC-COUNCIL
    2014
  • CERTIFIED ETHICAL HACKER
    EC-COUNCIL
    2012
Corentin's certifications are only visible to Malt Community members

Skill set

Elasticsearch
SQL
Open Source Intelligence (OSINT)
Data Analysis
Information Gathering
Strategic Watch
Threat Analysis
Technical Report Writing
Network Security
Log Analysis
Vulnerability Detection
Security Communication
Penetration Testing
Risk Analysis
SOC (Security Operation Center)
Security Architect
Project Management
CEH

Categories