Johann Gaebler, from Milwaukee, Wisconsin, is pursuing a Ph.D. in computational and mathematical engineering at Stanford School of Engineering. He graduated from Harvard University with bachelor’s degree in mathematics, and from the University of Oxford with a master’s degree in the history of science. Johann aspires to develop and apply data science tools to complex social problems, such as mass incarceration, hiring discrimination, and other issues at the intersection of statistics, computer science, and policy. He worked as a legal intern for the ACLU of Wisconsin and as a data scientist at the Stanford Computational Policy Lab. At Harvard, Johann received the Hoopes Prize for his senior thesis on large cardinals and projective determinacy.