About r00tsec

I'm Jonathan (r00tsec), a penetration tester and CHECK Team Member with extensive experience in offensive security. I specialize in web application security, phishing campaigns, and internal network testing, with particular interests in SAP security, IoT devices, phishing and red team operations.

In my 2 years as a Penetration Tester, I've developed a passion for uncovering complex vulnerabilities and helping organizations strengthen their security posture through comprehensive penetration testing and security assessments.

When I'm not working, I enjoy sharing knowledge through research, developing security tools, and contributing to the cybersecurity community through detailed write-ups and public talks (look out BSides London 2025!).