Lea is the Head of Privacy Engineering at Twitter. Previously, they were the Chief Privacy Officer of Humu. They work to build respect for users into products and systems through product design, privacy-enhancing infrastructure, application security, and novel research into both theoretical and practical aspects of privacy. They were previously the Global Lead of Privacy Technology at Google, working for over a decade on projects including logs anonymization, infrastructure security, privacy infrastructure, and privacy engineering. They earned a Ph.D. in computer science (with a focus on cryptography) at Carnegie Mellon University and a BS in electrical engineering and computer science from UC Berkeley.