Mairin received her J.D. from The UCLA School of Law, where she participated in the David J. Epstein Program in Public Interest Law and Policy. Following graduation, Mairin worked as a public defender in Miami, Florida. During law school, Mairin spent a semester externing with the Equal Justice Initiative, participated in the Criminal Defense Clinic, and was a comments editor with the UCLA Law Review. Mairin spent her law school summers interning with the Tennessee Office of the Post-Conviction Defender and the Public Defender Service for the District of Columbia. Prior to law school, Mairin worked for several years teaching high school social studies at a public school in Washington, D.C. Mairin received her undergraduate degree in Political Science from the University of Chicago, and a master’s degree in Teaching from American University.