Talk an AI into giving up a word it was sworn to protect. Guild Cyber turns hands-on offensive AI security into proof of skill you can share and verify, not another certificate to collect. Break the target in your browser, earn a Guild Mark, and climb a public leaderboard hiring managers can actually check.
Free proof you earn by breaking a real model, not by answering a quiz. Every mark keeps the full transcript of how you did it, so anyone can check the work. Share it the moment you earn it. This is where everyone starts.
A proctored, practical exam with a deliberately low pass rate, one for each track. You sit it and pass it; you don't collect it. It carries a harder bar and a separate process from the everyday marks, because a credential only keeps its weight if it stays scarce.
Anyone can teach the OWASP LLM Top 10 and MITRE ATLAS; the content was never the hard part. What's rare is proof that holds up: graded work, a public record, and a reputation you actually earn. We lead with Offense because it's the newest role, the easiest to get started in, and the most fun to show off.
Jailbreaks, prompt injection, data extraction, agent misuse. The part people can watch and share. Break an LLM in your browser and post the proof.
Building the defenses: securing RAG pipelines, preventing data leakage, hardening tool/agent access. The blue-team counterpart to every offense skill.
EU AI Act, NIST AI RMF, US EO on AI. This is the bridge into government and defense work, written in the language procurement teams already use, so it lands with commanders as well as coders.
Evasion, data poisoning and backdoors, model extraction, and inference attacks that pull private data back out of a model. The deep end, where the target is the math, not the prompt.
Poisoned dependencies and weights, model provenance and signing, pipeline hardening, and third-party risk. The attack surface almost no one maps: everything a model is assembled from.
Four targets that fight back harder as you go: the Steward, the Watchman, the Courier, and Meridian. Beat one and the next is meaner. Clear all four to reach Guildmaster, then meet the same names again inside the Guild, backed by live models and an Assessor at the door.
Certs are a red flag without proof. A public ranking of demonstrated red-team solves is the proof. Climb it in real time as you earn marks.
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Guild Marks are your hands-on proof: real work, earned as you go, but taken on your own. The Guild Seal is a different thing entirely. It's a proctored, practical exam with a deliberately low pass rate, one for each track, that you have to sit and pass. The marks get you in the door. The Seal is the one an employer treats as verified.