French cybersecurity engineer, based in Switzerland. In love with Switzerland and cheese 🫕

I enjoy cyber for 3 things: adrenaline, challenges and learning. I hope my articles will help you!

Career

  • since May 2025

    CTO at Honey Badger Consulting GmbH (Zurich)

  • Oct. 2023 – Apr. 2025

    Pentester at Deloitte (Zurich)

    Web, mobile and infra pentest for Swiss banks. Scoping, reports, client meetings. Some internal tooling.

  • Sept. 2023

    Cybersecurity engineer — CNAM & ESNA

    Thesis on reducing indicators of compromise on generic IT.

  • 2022–2023

    Pentester at ACCEIS (Rennes)

    Apprenticeship. Web and infrastructure pentest.

  • Sept. 2022

    Architecture designer, cybersecurity course — CNAM & ESNA

  • Apr. 2022 – Sept. 2023

    Conference manager — ESN'HACK

  • 2020–2022

    Drone engineering — Commando Kieffer (Lorient)

    Apprenticeship. Designed and built a secure, non-attributable cargo drone (8 kg payload): airframe, propulsion, comms, electronics, flight tests.

  • Feb. 2021

    Founding member — Medus'Hack

  • Sept. 2020

    IT Technology University Diploma

    Advanced computer course. Favourable opinion for engineering schools.

  • 2019–2020

    Web developer at Wixiweb (Rouen)

    Apprenticeship. HTML/CSS from mockups, PHP backends, first Proxmox.

  • 2018

    Scientific Baccalaureate

    Option “Computer Science and Digital Sciences”, obtained with highest honors

Certifications

  • March 2025 — OSCP & OSCP+
  • May 2024 — Burp Suite Certified Practitioner (BSCP)
  • May 2024 — Swiss A1/A3 drone operator

Skills

  • Web client & server exploitation
  • PHP, Python, Rust, Java, C#
  • Forensics (memory, network, disk)
  • Red Team
  • Reverse (Android, .NET)
  • Active Directory
  • Privilege escalation
  • Blockchain Web3 audit
  • Docker, Proxmox
  • ESP32, Arduino
  • OPNsense
  • 3D design

Soon

  • Stealthy exploitation
  • Hardware hacking
Talks given (7)
TypeTitleYearEventComment
ConferenceAdvanced shoemaking2023ESN’HACKBotting techniques
RumpThe good dummy2023ESN’HACKAutomated scraping
ConferenceOSS 503: Kevin is not responding2022ESN’HACKDDoS techniques
WorkshopAndroid reverse2022ESN’HACKBasics
RumpPanic to crit2022ESN’HACKpwn2learn 2022 feedback
Conf & WorkshopIn the land of XSS2021ESN’HACKComplex XSS
Conf & WorkshopJourney to the center of XSS2020ESN’HACKBasic XSS
Competitions (14)
DateNameChallengesResultsComment
29 June 2023pwn2learn bug bountyUnauth. to admin (9.8 CVSS)Most impactfulCOREFF brewery operations software
6 April 2023European Cyber Cup (EC2)Web, Forensic, OT1st team
12 May 2023HeroCTF v5Web, Blockchain, OSINT, MISC1st team
2 Dec. 2022HackTheBox University CTFWeb2nd teamSame points as 1st, last flag 10 min after
16 Nov. 2022European Cyber Week (ECW)Web, MISC1st team
4 Nov. 2022Unlock Your Brain CTFPentest2nd teamAttack-defense
8 June 2022European Cyber Cup (EC2)Web, Forensic, Bug Bounty3rd team
29 May 2022HeroCTF v4Web, Blockchain, OSINT1st team
1 April 2022BreizhCTFWeb, Blockchain, Pentest4th team1st students team
12 Jan. 2022pwn2learn bug bountyUnauth. to admin (9.6), DoS (7.4)1st6tzen, CSPN-certified
17 Nov. 2021European Cyber Week (ECW)Web, Forensic, MISC1st team
9 Sept. 2021European Cyber Cup (EC2)Web, Forensic, Bug Bounty1st team
28 Aug. 2020ESN’HACK CTFWeb, MISC1st team
May 201924 hours of Technology UniversitiesWeb dev, CTF2nd team1st team in cybersecurity
Achievements (7)
DateNameComment
2023Chall. MidnightFlag CTFCreated web challenges
Nov. 2022ESNA’s websiteesna.bzh, with a friend
26 Oct. 2022Hack in ParadizeCTF for the Caribbean Cybersecurity Conference
2022Chall. MidnightFlag CTFCreated web challenges
2021ESN’HACK’s websiteesnhack.fr
2019Fundraising ‘Mille et un sourires’Fundraising website
2017Anti-Theft appJava, school exam