Nicolas Chatelain
Directeur Pôle Audit Technique at CGI Business Consulting
Greater Paris Metropolitan Region France
Summary
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Rockstar🎓
Top SchoolNicolas Chatelain is a technical security leader with eight years of hands-on experience in offensive and defensive cybersecurity, currently directing the Technical Audit division at CGI Business Consulting in the Greater Paris area. He has built and led IT security offerings, managed R&D labs, and delivered PASSI-qualified audits, penetration tests, code reviews and Red Team engagements for both private and public-sector clients. A former independent consultant and long-tenured practitioner at Sysdream, he combines deep protocol and hardware attack expertise (IoT, SDR, JTAG/SPI) with tooling and exploit development in Go and Python. Nicolas also brings training and pre-sales experience, having authored internal tooling and lab infrastructure, and maintains a pragmatic focus on translating research into auditable, repeatable security practices.
8 years of coding experience
9 years of employment as a software developer
Certified Ethical Hacker, Certified Ethical Hacker at EC-Council UniversityExpert en ingénierie des systèmes et réseaux (RNCP niveau 1), Expert en ingénierie des systèmes et réseaux (RNCP niveau 1) at IN'TECH INFOBaccalauréat Sciences et Techniques de Gestion option Gestion des Systèmes d'Informations, Baccalauréat Sciences et Techniques de Gestion option Gestion des Systèmes d'Informations at Lycée Catherine Labouré
English
Github Skills (19)
socks10
tunnel10
tls1210
windows10
it-security10
tls1310
networking10
security10
mtls10
go10
tunneling10
libtls10
golang10
pentest9
pentesting9
Programming languages (7)
Github contributions (5)
nicocha30/ligolo-ng
Jul 2021 - Jul 2022
An advanced, yet simple, tunneling/pivoting tool that uses a TUN interface.
Contributions:24 releases, 5 reviews, 17 commits in 11 months
golangpivotingtunnelingoffensive-securitypost-exploitation
nicocha30/ligolo-ng-web
Feb 2025 - Mar 2025
Contributions:2 reviews, 8 PRs, 14 pushes in 1 month
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