Josh Aas

Josh Aas co-founded and runs Internet Security Research Group (ISRG), the nonprofit entity behind Let's Encrypt, the world's largest certificate authority helping to secure more than 290 million websites. He also spearheaded ISRG's latest projects: Prossimo, focused on bringing memory-safe code to security-sensitive software, and Divvi Up, a privacy-respecting metrics service. Josh worked in Mozilla's platform engineering group for many years improving the Firefox web browser and served as Mozilla's senior tech strategist. He has deep expertise in software security, ecosystem dynamics, and organizational leadership, and has advised Campfire Music Foundation since its founding in 2022.