Lisa Thiergart

Lisa is the CEO of ++Security Level 5++, an AI Security Tech Lab she founded with the mission to create the technical and strategic optionality for frontier AI labs to reach SL5 (security against priority nation state attacks) for their core internal operations in the coming years. Her team developed the world’s first ++SL5 Standard++, as well as is currently prototyping mock SL5 datacenters in coordination with frontier AI labs. The SL5 work brought together 100+ security engineering specialists across frontier AI labs, the US intelligence community and broader AI Security ecosystem to chart the technical path towards reaching nation-state secure AI Datacenters and frontier AI workflows by 2028. Lisa’s background includes a BSc in Computer Science from TUM, Graduate Machine Learning Research at Georgia Tech, as well as an AI Security DPhil researcher affiliation at the Oxford HAIGL Lab. Previous to founding SL5, Lisa was a senior director at IST, research lead at MIRI where she founded and lead the ++technical governance team++ (verification, hardware security, etc), as well as participated in MATS3 as a mentee under Alex Turner in 2023 where she helped pioneer the technique of ++activation steering++. Lisa has been a 2026 FLI Fellow, 2025 Brains Fellow, 2024 Foresight Fellow, Fulbright Scholar and participant in Entrepreneur First and 5050 by 50Years.