Guillaume Lopes
CTO Senior Penetration Tester
Lisbon, Lisbon, Portugal
Summary
👤
Senior🎓
Top SchoolGuillaume Lopes is a seasoned security leader and CTO with 11+ years of hands-on experience in penetration testing, security audits, and offensive security across Windows, Linux, Active Directory, web, API, wifi and Android environments. He currently leads technical strategy at RandoriSec after senior roles at Cisco and multiple security consultancies, combining deep red-team expertise with project management and training experience. A frequent conference speaker and instructor, he has taught security and offensive tooling at French engineering schools and delivered talks at DeepSec, Hack In Paris, BSides and HITB. Guillaume is also an active CTF competitor with the Tipi'hack team, bringing practical exploit development and live-adversary skills to assessments. He pairs rigorous code/configuration review and compliance knowledge with a pragmatic approach to transforming findings into actionable remediation. Based in Lisbon, he blends academic teaching background with enterprise-grade offensive practice to bridge learning and operational security.
11 years of coding experience
8 years of employment as a software developer
Master Degree, Computer Engineering in System, Network and Internet, Master Degree, Computer Engineering in System, Network and Internet at Université Denis Diderot (Paris VII)
Portuguese, French, English, Spanish
Github Skills (140)
webview10
windows10
apollo10
web-frontend10
javascript10
linux10
js10
rust10
high-performance10
electron10
rocket10
nodejs10
macos10
desktop10
semantic10
Programming languages (11)
Github contributions (5)
mrguiman/elementary-electron-boilerplate
Apr 2021 - Sep 2021
Boilerplate(s) to run the elementary audio engine within an electron app
Contributions:22 commits, 1 PR, 18 pushes in 4 months
electronboilerplateelementaryaudio-engineaudio
mrguiman/dotfiles
Apr 2017 - Jun 2022
Contributions:84 commits, 2 PRs, 116 pushes in 5 years 2 months
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