MetaAI security tech lead
Aug 2022 — Feb 2026
Joshua Saxe is CTO and co-founder of Abundant Security, where he works on AI-powered cyber defense. Previously, he was a Principal AI Security Engineer at Meta, contributing to systems including LlamaFirewall and other generative-AI security tools. Earlier, he served as Chief Scientist at Sophos and Chief Data Scientist at Invincea. He is also a published author and researcher in machine learning and cybersecurity.
Joshua Saxe is CTO and co-founder of Abundant Security, where he works on AI-powered cyber defense. Previously, he was a Principal AI Security Engineer at Meta, contributing to systems including LlamaFirewall and other generative-AI security tools. Earlier, he served as Chief Scientist at Sophos and Chief Data Scientist at Invincea. He is also a published author and researcher in machine learning and cybersecurity.
