Arnold Jun is currently the Business & Ops Lead at Particle, a position they have held since 2025. Previously, they served as a Director of Corporate Development & Strategy at Twitter from 2015 to 2022, where they led coverage of machine learning and artificial intelligence. Prior to that, Arnold worked as a Vice President in Technology Investment Banking at Citi and gained experience as an Associate in Technology M&A at Union Square Advisors from 2007 to 2011. Arnold earned their business education at Washington University in St. Louis - Olin Business School, completing their studies in 2006.
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