John Hallman is a Member of Technical Staff at OpenAI since March 2024, focusing on pretraining, reinforcement learning, and applications in bio/health. Prior to this role, John served as a Machine Learning Engineer at AKASA from August 2022 to February 2024, specializing in healthcare language models. From July 2020 to July 2022, John worked at Sisu, where the focus was on data analytics using artificial intelligence. John began a research career as a Student Researcher at Google Brain, contributing to projects on reinforcement learning and optimization theory from June 2019 to May 2020. John holds a Bachelor of Arts in Mathematics from Princeton University.
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