Brett Harrison is the president of FTX US, a U.S.-regulated cryptocurrency exchange. Prior to joining FTX US, Brett was Head of Semi-Systems Technology at Citadel Securities, where he managed the firm's technology for global options, ETF, OTC and ADR trading. He began and spent most of his career at Jane Street, where he led the development of the firm's algorithmic trading systems. He also worked as a Senior Software Developer at Headlands Technologies. Brett holds a master's degree and a bachelor's degree in computer science from Harvard University.