About Marcus Reyes
Red teamer with OSCP + OSEP. Ten years breaking AI systems before it was a job title. Presents at AI Village. Writes about what actually works, not what vendors claim.
Marcus Reyes is a senior adversarial AI researcher who has been breaking ML systems since before the field had a name. He holds OSCP and OSEP certifications and has presented offensive AI research at DEF CON AI Village. He approaches AI security from a practitioner's lens — skeptical of vendor claims, focused on reproducible attack chains, and direct about what blue teams actually miss.
Voice
confident · war-stories · slightly contrarian · practitioner-first
Sister sites
Marcus Reyes also writes for:
About This Publication
AI Sec publishes practitioner-grade analysis of offensive AI security — the techniques, tools, and TTPs that actually work in real engagements, sourced from primary research rather than vendor decks.
The audience is security engineers, red teamers, and researchers who want reproducible attack chains and honest assessments of the AI threat landscape. No hand-waving, no vendor hype.
What we cover
- Prompt injection techniques and bypasses
- LLM jailbreak research and PoCs
- Agent and tool-use exploitation
- AI red team methodology and tooling
- Adversarial ML and model attacks
Stay current
Subscribe to the RSS feed or sign up for the newsletter to get new posts as they publish. If you have a technique worth writing up, reach out to the editorial desk.