Meet the Founder
Johnny Clejel
“Hijack” was my callsign in the Marine Corps. Now it's the name behind one of the most focused AI security research practices in the industry.
I'm a penetration tester and AI security researcher (OSCP, CISA, PenTest+ certified) specializing in the intersection of offensive security and artificial intelligence. I've spent years going deep on how large language models and AI agents get attacked, manipulated, and exploited.
I'm currently building Vigil, a platform for assessing ISO 42001 and EU AI Act compliance, delivering a clear roadmap of what your organization needs to do to meet the standard.
Background
Marine Corps veteran. OSCP certified penetration tester. CISA. PenTest+. I've spent the last several years doing webapp and network pentesting and have gone deep on AI security: how large language models and AI agents get attacked, manipulated, and exploited, and what organizations need to do about it before regulators force the issue.
What I Write About
AI security. LLM red teaming. ISO 42001 compliance.
If that's relevant to what you're working on, let's connect.