Leon Derczynski is principal research scientist in LLM security at NVIDIA and professor of natural language processing (NLP) at ITU Copenhagen. He has published over 100 NLP papers. Leon contributes to leading bodies on LLM security, is on the OWASP LLM Top 10 core team, works on ML Commons, and is the founder of the ACL SIG on NLP Security. Leon heads up the LLM vulnerability scanner garak with the NVIDIA NeMo Guardrails team.