You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Valentin D.VD

Valentin D.

Cybersecurity Expert | OSINT, CTI

€700/day
Paris, FR
8-15 years

Average response time: 2 hours

Freelancer profile translated to English.
Back to original language

About Valentin

I find what you don't know that is known about you.

Employee credentials in public leaks. Infrastructure mappable from a simple browser. Forgotten subdomains, orphaned accounts, exposed personal data without anyone noticing.

────────────────────────────────────
WHAT I DO
────────────────────────────────────

◆ OSINT & EXPOSURE SURFACE
Reconstruction of your digital footprint as an attacker sees it: exposed infrastructure, forgotten assets, presence on forums and underground markets. Concrete deliverables, evidence, actionable recommendations.

◆ LEAK RESEARCH & COMPROMISED DATA
Analysis of leaked databases, pastebins, specialized Telegram channels. Credentials, internal documents, data of your employees or executives — I qualify the impact and prioritize actions.

◆ CYBER THREAT INTELLIGENCE
Monitoring of APT groups targeting your sector. I transform noise into actionable intelligence for your CIO or CISO.

────────────────────────────────────
MY PROFILE
────────────────────────────────────

Cyber Defense Manager in the energy sector. I have led SOC, CERT, and CTI teams of up to 30 people and coordinated major incident responses.

→ Certified CEH & CISSP
→ Comfortable in a terminal as in a COMEX meeting

Want to know what an attacker already knows about you?
Contact me.
  • French

    Native or bilingual

  • Portuguese

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 50km)

Experience

  • NaTran
    Head of Cyber Defense
    ENERGY AND UTILITIES
    January 2026 - Today (5 months)
    Head of the Cyber Defense department, leading a multidisciplinary team of 30 employees across 6 units: SOC, CERT, CTI, Vulnerability Operations Center, and Red Team.

    Scope & Responsibilities:
    • Operational and strategic supervision of detection, incident response, and threat management activities
    • Leadership of the transition from a project team to a structured Cyber Defense department
    • Coordination with CIOs, CISOs, and business unit leaders on major incidents and overall security posture
    • Definition of processes, tooling, and team skill development

    Areas of Expertise:
    • Threat Intelligence & targeted threat analysis (APT, data leaks, external exposure)
    • OSINT & attack surface mapping
    • Incident Response & digital forensics (DFIR)
    • Cyber crisis management and communication to decision-makers
    OSINT CTI cybersecurity-incident-management Cybersecurity Strategy Team Management
  • NATRAN
    Operational Lead SOC and CERT
    April 2022 - December 2025 (3 years and 8 months)
    🎯 Supervision of SOC & CERT teams: Coordination of operational activities, KPI definition, dashboard creation, daily team animation.

    🚨 Crisis & Major Incident Management: Leading crisis cells, cross-functional coordination between CIOs, CISOs, and technical stakeholders.

    🚀 Business Development: Implementation and structuring of CTI, Digital Forensics, and Red Team units. Team growth from 5 to 20 analysts.

    🧬 Digital Forensics: Forensic analysis, IOC extraction, detailed report writing usable by incident response teams.

    🛰️ Cyber Threat Intelligence (CTI): Monitoring targeted threats, APT groups, and information leaks via OSINT and strategic partners.

    🌐 Attack Surface Management: Mapping of exposed assets, identification of risks related to shadow IT, and remediation recommendations.

    💰 Budgetary & Contractual Management: Budget creation, expense tracking, contracting, and selection of specialized external profiles.
    Cybersecurity CTI Incident Management
  • GRTGAZ
    CERT Analyst
    June 2020 - April 2022 (1 year and 10 months)
    📊 Security Alert Supervision: Analysis, triage, and prioritization of alerts generated by the SOC and detection tools (EDR, SIEM, etc.), in relation to real threats.

    🔍 Incident Management: Rapid investigation, qualification, and response to security incidents, in coordination with IT and business teams.

    🔧 Vulnerability Qualification: Risk assessment, prioritization based on context, support for patch management teams.

    ⚙️ Automation & Scripting: Creation of Python and PowerShell scripts to automate recurring tasks (alerting, enrichment, IOC deployment, etc.).

    📘 Playbook Development: Design of operational procedures to structure SOC/CERT response and enhance analyst effectiveness.
    Forensics Digital Forensics CTI

Recommendations

Be the first to recommend Valentin

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • CYBERSECURITY ENGINEER
    EFREI
    2018
    Ingénieur en Cybersécurité spécialisé en sécurité offensive et investigation numérique.

Certifications

  • CISSP
    ISC2
    2026
  • RED TEAM OPS
    Zero Point Security
    2025
    Red Team PenTest

Skill set

Categories