Kristian Lum is a Sr. Staff Machine Learning Researcher at Twitter. Previously she was an Assistant Research Professor in the Department of Computer and Information Science at the University of Pennsylvania and the Lead Statistician at the Human Rights Data Analysis Group. She is a founding member of the ACM Conference on Fairness, Accountability, and Transparency and has served in various leadership roles since its inception, growing this community of scholars and practitioners who care about the responsible use of "AI" systems. Her research looks into (un)fairness of predictive models with particular attention to those used in a criminal justice setting. She received a PhD in Statistics from Duke University.