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Nicolas MarcellinNM

Nicolas Marcellin

IT Security Auditor

€650/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Nicolas

Cybersecurity Auditor with nearly 10 years of experience
Formerly PASSI Qualified

🔍 Offensive IT Security

Penetration Testing:
Assessing system security by identifying and exploiting vulnerabilities.

Configuration Audits:
Analyzing system configurations to ensure they adhere to security best practices.

Architecture Audits:
Evaluating existing network and system architectures.

Code Audits:
Reviewing and analyzing source code to detect security flaws and vulnerabilities.

🔧 Industrial Systems (IS) Security

Assessing the security of SCADA, ICS, and other industrial systems to ensure their resilience against cyberattacks.

🏢 Physical Security Audit
Evaluating the security of physical facilities, including access controls, surveillance, and security procedures.

🏢 Red Team Operations:

Realistic attack simulations to test an organization's defenses, including physical and social penetration tests.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 50km), Marseille (up to 50km), Bordeaux (up to 50km), Lyon (up to 50km), Toulouse (up to 50km)

Experience

  • Antels
    Manager
    DIGITAL AND IT
    January 2023 - Today (3 years and 5 months)
    Carried out various fixed-price technical missions as part of cyber programs for local authorities, as well as in the energy and telecommunications sectors.
    Test d'intrusion Web Test d'intrusion interne Penetration Testing Test d'intrusion audit de code audit d'architecture Active Directory AD OWASP NIST CIS
  • ON-X Groupe
    IT Security Auditor
    DIGITAL AND IT
    May 2019 - December 2022 (3 years and 7 months)
    ON-X allowed me to work in complementary fields to Provadys, enabling me to cover most market sectors. I was also responsible for conducting technical interviews and managed missions end-to-end (from drafting the commercial proposal to reporting the results).
    PASSI Test d'intrusion interne Test d'intrusion Web Phishing Test d'intrusion physique Pilotage des missions Entretiens techniques Recrutement
  • Provadys
    IT Security Auditor
    DIGITAL AND IT
    May 2015 - May 2019 (4 years)
    Paris, France
    Intern for 6 months, then technical auditor. I made my mark at Provadys, which has strong expertise. The company is now known as Almond.
    Test d'intrusion Web Test d'intrusion interne Audit Wi-Fi Audit d'applications mobile iOS/Android Audit de configuration ARJEL Audit d'architecture Audit de code Test d'intrusion physique Red Team

Recommendations

Corentin V.CV
FU
FU
+2
Corentin V. and 4 other people have recommended Nicolas

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Education

  • Mastère en sécurité des systèmes d'information
    ESIEA
    2015

Certifications

  • OSCP
    Offensive Security
    2017
    Tests d'intrusion Web Tests d'intrusion internes
  • Physical Penetration Testing with Alexandre Triffault
    Sysdream
    2022
    Crochetage Casting RF RFID Décodage Impressionning

Skill set

Categories