Hi, I’m Raúl Calvo Laorden, known as r4ulcl. I am a Senior Offensive Security Engineer and Pentester with 7+ years of experience across web, infrastructure, Active Directory, and Wi-Fi. I focus on offensive security, designing realistic attack paths, automating repeatable chains, and turning complex ideas into practical skills through hands-on labs and workshops. My current priority is research and development of new tools and methods, and teaching through clear, lab-driven training.

• Areas of focus: Active Directory attack paths and hardening, Wi-Fi security assessments, web and infrastructure exploitation, reconnaissance automation, post-exploitation, and bug bounty methodology.

• Research and teaching: I design lab-based exercises, deliver workshops and document methodologies so others can reproduce results safely.

• I have the following certifications: OSCP , CRTP , CARTP and CWP

• I maintain a personal micro-datacenter with multiple servers and services that I use to prototype, test and harden techniques at scale.

• In my spare time I develop offensive security tools and automation, using Go, Docker and git.

• I am the author of WiFiChallenge Lab , a 100% virtualized realistic lab to learn and practice Wi-Fi hacking and created the Certified WiFiChallenge Professional (CWP) cert.

• I continuously improve my skills through structured study, experimentation and knowledge sharing.

• Themes: Dracula dark or Solarized dark .

Feel free to contact me through any of my online profiles or by email using my GPG key

Talks Link to heading

• RootedCON 2022 - “WiFiChallenge Lab - How to learn Wi-Fi hacking without dying trying” (Spanish) - (Slides GitHub )

Workshops Link to heading

• “Advanced Wi-Fi Attacks for Red Team Professionals”
  • DEF CON 31 (2023) - (Slides GitHub )
  • Navaja Negra XI (2023) (Spanish) - (Slides GitHub )
  • Disobey 2024

GitHub Link to heading